refactor(component): decouple export summary assembly from repositories

[VanKhanhAnny]

Fixes #3947

This PR refactors the component export summary path so that ComponentSummary no longer performs direct repository-backed data fetching for export-related summaries.

• The change keeps the current export behavior but moves release and vendor loading responsibilities to the caller side, which makes the export summary path easier to reason about and reduces coupling in the component backend.

No new dependencies were added

Suggest Reviewer

@GMishx @bibhuti230185 @amritkv @rudra-superrr

How To Test?

1. Ensure the local CouchDB test instance is available and the backend test environment is configured.
2. Run:
   mvn --% -pl backend/components -Dbase.deploy.dir=D:/sw360/.deploy -Denforcer.skip=true -Dsurefire.failIfNoSpecifiedTests=false -Dtest=ComponentDatabaseHandlerTest test
3. Verify that the test suite passes.
4. Confirm that export-related component summary behavior remains unchanged, including:

• export summary generation
• detailed export summary generation
• export-related component search behavior

Checklist

Must:

• All related issues are referenced in commit messages and in PR