Rename year_month to year_month_found in all affected files

[gjong]

Updated column names in database migration scripts, JPA entities, and test data to reflect the new year_month_found naming. This ensures consistency across the codebase and aligns with recent schema changes.

Breaking change

Proposed change

Fix an issue in the analysis where the column name year_month is used which is a reserved mysql keyword.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to the application)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
22.2% Duplication on New Code

See analysis details on SonarQube Cloud