Update postgres Docker tag to v18

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
postgres	service	major	17.7 -> 18.1

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[github-actions]

Hello 👋

here is the most recent benchmark result:

SubscriptionEngineBench
=======================

+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                               | memory                                     |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>  | Tag: base       | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 3.263s (±0.00%) | 3.262s (±0.00%) | +0.03%    | 47.078mb        | 47.613mb   | -1.12%      |
+---------------------------+-----------------+-----------------+-----------+-----------------+------------+-------------+

SimpleSetupBench
================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 1.142ms (±0.00%)   | 1.131ms (±0.00%)   | +1.04%    | 34.385mb        | 34.385mb   | 0.00%       |
| benchLoad10000Events ()                | 50.436ms (±0.00%)  | 50.256ms (±0.00%)  | +0.36%    | 34.385mb        | 34.385mb   | 0.00%       |
| benchSave1Event ()                     | 1.258ms (±0.00%)   | 1.245ms (±0.00%)   | +1.02%    | 34.385mb        | 34.385mb   | 0.00%       |
| benchSave10000Events ()                | 216.726ms (±0.00%) | 216.598ms (±0.00%) | +0.06%    | 34.385mb        | 34.385mb   | 0.00%       |
| benchSave10000Aggregates ()            | 8.043s (±0.00%)    | 8.122s (±0.00%)    | -0.97%    | 34.385mb        | 34.385mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 5.241s (±0.00%)    | 5.127s (±0.00%)    | +2.23%    | 34.385mb        | 34.385mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SnapshotsBench
==============

+----------------------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                   | memory                                     |
+----------------------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>    | Tag: base         | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| benchLoad10000EventsMissingSnapshot () | 50.332ms (±0.00%) | 53.902ms (±0.00%) | -6.62%    | 34.390mb        | 34.390mb   | 0.00%       |
| benchLoad10000Events ()                | 1.135ms (±0.00%)  | 1.165ms (±0.00%)  | -2.57%    | 34.390mb        | 34.390mb   | 0.00%       |
+----------------------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+

SplitStreamBench
================

+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                         | time (kde mode)                                     | memory                                     |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                 | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad10000Events () | 4.967ms (±0.00%)   | 5.652ms (±0.00%)   | -12.13%   | 34.893mb        | 34.893mb   | 0.00%       |
| benchSave10000Events () | 328.796ms (±0.00%) | 334.555ms (±0.00%) | -1.72%    | 34.961mb        | 34.961mb   | 0.00%       |
+-------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SimpleSetupStreamStoreBench
===========================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 1.088ms (±0.00%)   | 1.082ms (±0.00%)   | +0.51%    | 34.568mb        | 34.568mb   | 0.00%       |
| benchLoad10000Events ()                | 54.989ms (±0.00%)  | 55.574ms (±0.00%)  | -1.05%    | 34.568mb        | 34.568mb   | 0.00%       |
| benchSave1Event ()                     | 1.218ms (±0.00%)   | 1.200ms (±0.00%)   | +1.43%    | 34.568mb        | 34.568mb   | 0.00%       |
| benchSave10000Events ()                | 288.636ms (±0.00%) | 285.106ms (±0.00%) | +1.24%    | 34.568mb        | 34.568mb   | 0.00%       |
| benchSave10000Aggregates ()            | 8.468s (±0.00%)    | 8.176s (±0.00%)    | +3.58%    | 34.568mb        | 34.568mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 5.434s (±0.00%)    | 5.328s (±0.00%)    | +1.99%    | 34.569mb        | 34.569mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

PersonalDataBench
=================

+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
|                                        | time (kde mode)                                     | memory                                     |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| subject                                | Tag: <current>     | Tag: base          | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+
| benchLoad1Event ()                     | 1.112ms (±0.00%)   | 1.083ms (±0.00%)   | +2.67%    | 35.580mb        | 35.580mb   | 0.00%       |
| benchLoad10000Events ()                | 97.253ms (±0.00%)  | 94.345ms (±0.00%)  | +3.08%    | 35.580mb        | 35.580mb   | 0.00%       |
| benchSave1Event ()                     | 1.783ms (±0.00%)   | 1.879ms (±0.00%)   | -5.10%    | 35.580mb        | 35.580mb   | 0.00%       |
| benchSave10000Events ()                | 255.930ms (±0.00%) | 247.896ms (±0.00%) | +3.24%    | 35.582mb        | 35.582mb   | 0.00%       |
| benchSave10000Aggregates ()            | 12.892s (±0.00%)   | 12.223s (±0.00%)   | +5.47%    | 35.580mb        | 35.580mb   | 0.00%       |
| benchSave10000AggregatesTransaction () | 9.923s (±0.00%)    | 9.484s (±0.00%)    | +4.63%    | 36.039mb        | 36.039mb   | 0.00%       |
+----------------------------------------+--------------------+--------------------+-----------+-----------------+------------+-------------+

SubscriptionEngineBatchBench
============================

+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
|                           | time (kde mode)                                   | memory                                     |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| subject                   | Tag: <current>    | Tag: base         | time-diff | Tag: <current>  | Tag: base  | memory-diff |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+
| benchHandle10000Events () | 78.562ms (±0.00%) | 76.969ms (±0.00%) | +2.07%    | 34.850mb        | 34.850mb   | 0.00%       |
+---------------------------+-------------------+-------------------+-----------+-----------------+------------+-------------+

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