chore: librarian update image pull request: 20251212T180513Z

[parthea]

feat: update image to us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:d7caef319a25d618e20ba798b103434700bfd80015f525802d87621ca2528c90

This PR was created using the following command

partheniou@partheniou-vm-3:~/git/proto-plus-python$ librarian update-image -push
...
time=2025-12-12T18:05:15.002Z level=INFO msg="successfully pushed changes" refSpec=+refs/heads/librarian-20251212T180513Z:refs/heads/librarian-20251212T180513Z
time=2025-12-12T18:05:15.002Z level=INFO msg="creating PR" branch=librarian-20251212T180513Z base=main title="chore: librarian update image pull request: 20251212T180513Z"
time=2025-12-12T18:05:16.170Z level=INFO msg="pr created" url=https://github.com/googleapis/proto-plus-python/pull/554
time=2025-12-12T18:05:16.170Z level=INFO msg="labels added to issue" number=554 labels=[]

[gemini-code-assist]

Summary of Changes

Hello @parthea, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on maintenance by updating the Docker image used for the Python librarian generator. It also introduces a new configuration entry, last_generated_commit, for the proto-plus library, likely to track the last commit from which the library was generated.

Highlights

• Image Update: The python-librarian-generator Docker image has been updated to a new SHA256 hash: d7caef319a25d618e20ba798b103434700bfd80015f525802d87621ca2528c90.
• Configuration Addition: A new field, last_generated_commit, has been added to the proto-plus library configuration within the .librarian/state.yaml file.

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[gemini-code-assist]

Code Review

This pull request contains automated changes from the librarian tool, updating the generator image and modifying the .librarian/state.yaml configuration. The image hash has been updated, and a new field last_generated_commit has been added. While the changes seem to be part of a routine update, I have provided a suggestion to improve the semantic clarity of the new configuration field. Additionally, there's a minor inconsistency between the PR title (chore:) and the description (feat:), which could be aligned for better commit history clarity.

[gemini-code-assist]

For better semantic clarity, consider using null instead of an empty string "" to indicate that there is no last generated commit yet. This makes the intent clearer that the value is absent, rather than being an empty string value. In YAML, this can be represented explicitly with null.

    last_generated_commit: null