Unicron fix 4813

[lukaszgryglicki]

This fixes #4813 - but needs to restore to latest deployed branch which is v2.2.6 and only then adds a single fix in cla-backend-go/github/github_repository.go file.

cc @mlehotskylf @jarias-lfx @ahmedomosanya

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✨ Finishing touches

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Pull Request Overview

This PR implements a fix for issue #4813 by reverting caching and GraphQL optimizations that were causing issues, restoring to a simpler v2.2.6 baseline approach. The changes revert to the original GitHub API commit fetching logic, simplify comment body normalization, and remove complex caching mechanisms to improve reliability.

• Reverts GraphQL-based commit fetching to the original REST API approach
• Removes complex caching mechanisms that were causing inconsistencies
• Simplifies comment body handling and PR status logic
• Cleans up utility scripts and test files

Reviewed Changes

Copilot reviewed 35 out of 39 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
cla-backend-go/github/github_repository.go	Reverts GraphQL optimizations back to REST API calls
cla-backend/cla/models/github_models.py	Removes caching and GraphQL features
cla-backend/cla/utils.py	Simplifies logging and removes unused function
tests/functional/*	Moves test files and fixes path issues
utils/*	Removes debug scripts

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[lukaszgryglicki]

All AI feedback is already addressed in #4814 - because all fo that was planned to be a part of the new release, this is why I suggest to approve & merge #4814 instead and do a full new release @mlehotskylf @jarias-lfx .