test: add unit tests for invalid review ID handling in CodeReviewManager

[jyotish6699]

Summary

This PR improves the test coverage of the CodeReviewManager by adding unit tests that verify the existing validation behavior when an invalid review_id is provided.

Changes

Added the following unit tests:

• test_add_feedback_invalid_review_id

  • Verifies that add_feedback_comment() raises ValueError when an invalid review_id is provided.

• test_score_category_invalid_review_id

  • Verifies that score_category() raises ValueError when an invalid review_id is provided.

• test_complete_review_invalid_review_id

  • Verifies that complete_review() raises ValueError when an invalid review_id is provided.

Why

These tests improve coverage of the existing validation logic by ensuring invalid review identifiers are handled consistently across the code review workflow. This change only adds test coverage and does not modify production code or existing functionality.

Testing

Executed the following command:

python -m pytest tests/test_code_review.py -v

Result:

• All tests in tests/test_code_review.py passed successfully.

Related Issue

Closes #1280

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