Functionality for noRandomDuplicates parameter and custom Stream options with seeding

[allenshen13]

Add NoRandomDuplicates and Custom Stream Seeding Features

NoRandomDuplicates:

Prevents duplicate query selection during random execution until all queries have been executed at least once.

When true: Creates shuffled sequences of all queries, executing each query once before repeating any.

{
  "random_execution": true,
  "randomly_execute_until": "20",
  "no_random_duplicates": true,
  "query_files": [
    "../queries/complex-1.sql",
    "../queries/complex-2.sql",
    "../queries/complex-3_ordered.sql",
  }

Custom Streams and Seeding:

Purpose: Enables deterministic random behavior across stream instances while maintaining reproducibility.

Individual Stream Seeds:

{
  "streams": [
    {
      "stream_name": "query_stream.json",
      "stream_count": 3,
      "seeds": [12345, 67890, 11111]
    }
  ]
}

Base Stream Seed (applied to all instances with offset for each one):

{
  "streams": [
    {
      "stream_name": "query_stream.json", 
      "stream_count": 3,
      "seeds": [54321]
    }
  ]
}

[ethanyzhang]

I do not quite like that we introduce a new way to add vertices in the execution graph. The core need here is to let one existing vertex in the graph to have multiple streams with different random seed. What you can probably do is to remove the StreamPath, and keep the StreamCount and Seeds. For queries, always use the stage's queries.

[ethanyzhang]

Please update pbench_queries_ddl.sql with the new column

[ethanyzhang]

And why do we need a seed in this table?

[allenshen13]

There are two tables, pbench_runs and pbench_queries. Currently pbench_runs has a seed column, but with this additional functionality to be able to seed each stream, there had to be some way to add reporting for multiple seeds in a run. The simplest way I found to do it was to add 'seed' as a column to pbench_queries and group by stage_id to be able to present it in Grafana.

[allenshen13]

I was looking for other ways to report seed per stream, please let me know if you have any suggestions.

[ethanyzhang]

Suggested change

	type Streams struct {
	type Stream struct {

This is not a collection

[ethanyzhang]

Why not using your Validate() method? The code seems duplicated.