chore: migrate Unity catalog from deprecated SqlParsingBuilder to SqlParsingAggregator and remove SqlParsingBuilder

[sgomezvillamor]

Summary

• Removes deprecated SqlParsingBuilder - legacy/deprecated code with no tests
• Migrates Unity catalog to SqlParsingAggregator - strategic solution used across all other SQL sources
  • Enhances Unity catalog lineage with better column-level details and transform operations

Benefits

• Better lineage: Unity catalog now gets transform operations and confidence scores
• Consistency: All SQL sources now use the same strategic SqlParsingAggregator
• Maintenance: Removed untested legacy code

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!

[alwaysmeticulous]

✅ Meticulous spotted 0 visual differences across 996 screens tested: view results.

Meticulous evaluated ~8 hours of user flows against your PR.

_{Expected differences? Click here. Last updated for commit a9b8a18. This comment will update as new commits are pushed.}

[codecov]

Bundle Report

Bundle size has no change ✅