chore: remove CodeFlash integration

[ogabrielluiz]

Summary

• Remove CodeFlash GitHub Actions workflow, dependencies, and configuration
• CodeFlash was generating spam PRs against the repository and is no longer needed

Summary by CodeRabbit

• Chores
  • Removed development optimization tooling and associated workflow automation to streamline the development environment.

[coderabbitai]

Walkthrough

This PR removes the codeflash code optimization tool from the project by deleting the associated GitHub Actions workflow, removing the dev dependency, and eliminating all related configuration settings.

Changes

Cohort / File(s)	Summary
Codeflash Tooling Removal .github/workflows/codeflash.yml, pyproject.toml, src/backend/base/pyproject.toml	Deleted codeflash GitHub Actions workflow (37 lines), removed codeflash>=0.8.4 dev dependency, and eliminated entire [tool.codeflash] configuration block including module-root, tests-root, test-framework, ignore-paths, formatter-cmds, and pytest-cmd settings.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 7

✅ Passed checks (7 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'chore: remove CodeFlash integration' accurately and concisely describes the main change across all modified files (workflow deletion, dependency removal, and configuration cleanup).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Test Coverage For New Implementations	✅ Passed	This PR removes CodeFlash integration (workflow, dependencies, configuration) without introducing new functionality, bug fixes, or features that would require test coverage.
Test Quality And Coverage	✅ Passed	The Test Quality and Coverage check is not applicable to this PR as it exclusively removes existing CodeFlash integration components without implementing new functionality.
Test File Naming And Structure	✅ Passed	This check is not applicable to the pull request. The PR exclusively removes CodeFlash integration by deleting a workflow file and removing related dependencies and configurations from pyproject.toml files. No test files are modified, added, or removed in this PR, so the test file naming and structure verification requirements do not apply to these changes.
Excessive Mock Usage Warning	✅ Passed	The custom check regarding excessive mock usage in tests is not applicable to this pull request. No test files were modified, created, or deleted, and no mock objects or test design elements were touched.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/deactivate-codeflash

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 35.20%. Comparing base (6ed0091) to head (5760af8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11670      +/-   ##
==========================================
- Coverage   35.20%   35.20%   -0.01%     
==========================================
  Files        1521     1521              
  Lines       72923    72923              
  Branches    10936    10936              
==========================================
- Hits        25674    25672       -2     
- Misses      45854    45855       +1     
- Partials     1395     1396       +1     

Flag	Coverage Δ
backend	55.65% <ø> (-0.01%)	⬇️
lfx	42.10% <ø> (-0.01%)	⬇️

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see 5 files with indirect coverage changes

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