fix(languages): strengthen Scala Dart and Groovy graph evidence

[forhappy]

Summary

• Preserve Scala nested-object ownership and symbolic/operator dispatch identities.
• Resolve Scala type-level and path-dependent references (dot and hash forms) from local declarations.
• Recover Dart generated-file signatures, named/factory constructors, getters/setters, and generated functions.
• Qualify Groovy normal/static imports, aliases, and all extends/implements targets.
• Add focused language conformance and Groovy qualification fixtures plus provider/oracle coverage.

Verification

• cargo test -p compass-languages --test language_wave_universal_conformance --locked — 17 passed
• cargo test -p compass-languages --lib --locked — 60 passed
• python3 -m unittest discover -s scripts/tests — 35 passed
• python3 scripts/qualify_groovy_universal.py --mode fixture — passed
• Changed-file rustfmt and diff checks — passed

Notes

The full resolve test chain is currently blocked by unrelated dirty-worktree TypeScript borrow errors, and the broad fixture qualification gate was interrupted after an existing framework-scale case stopped making progress.