fix(extract): skip Java type parameter references

[oleksii-tumanov]

Summary

• track Java type parameters declared by enclosing types, methods, and constructors
• skip unqualified references to those parameters while preserving real type references
• cover per-file output and cross-file collisions with real classes of the same name

Fixes #1517

Result

Label-normalized verification summary from the final extraction:

{
  "type_parameter_nodes": [],
  "type_parameter_reference_edges": [],
  "retained_edges": [
    {
      "source": "Box",
      "target": "Base",
      "relation": "inherits",
      "confidence": "EXTRACTED"
    },
    {
      "source": "convert",
      "target": "Payload",
      "relation": "references",
      "context": "generic_arg",
      "confidence": "EXTRACTED"
    }
  ]
}

Testing

• uv run --frozen pytest tests/test_languages.py tests/test_java_type_resolution.py -q -k java_type_parameters (2 passed)
• uv run --frozen pytest tests/ -q --tb=short (2496 passed, 3 skipped)
• uv run --frozen ruff check graphify/extract.py tests/test_languages.py tests/test_java_type_resolution.py (passed)

[safishamsi]

Thanks @oleksii-tumanov — clean fix for the nit flagged when #1511 landed. Landed on v8 in 8b9a998 with your authorship. The in-scope type-parameter collection (class/interface/record/method/constructor, bounded + multiple) is correctly scoped to the declaring node, so a real class sharing a name with a type param elsewhere is still referenced, and nested generics keep the real types. Verified: Box<T> extends Container<T> → inherits Container with no T edge; Map<String,List<T>> keeps Map/String/List. Closing as merged-by-port — ships in 0.9.1.