fix(treesitter): index Java record definitions

[odvcencio]

Summary

• supplement the inferred Java tags query with record_declaration type definitions
• preserve existing inferred Java methods and call references
• cover the record, both methods, and the internal call reference

Evidence

• exact baseline: 70836d6
• bounded matrix stopped at probe 1 because User was absent while label and normalize methods remained indexed
• the Java AST query for record_declaration and identifier matches User directly
• live indexing changes the sample from 2 to 3 symbols while preserving the label -> normalize call edge
• production and regression logic are model-authored; integration changed only malformed hunk counts and new-file placement

Validation

• go test ./pkg/lang/treesitter -run ^TestJavaRecordDefinition$ -count=20
• focused Ruby, JavaScript, TypeScript, Rust, and Java tag tests
• go test ./pkg/lang/treesitter -count=1
• go test -race ./pkg/lang/treesitter -count=1
• go test ./pkg/index ./pkg/xref ./cmd/canopy -count=1
• go test ./... -count=1
• go test -race ./... -count=1
• git diff --check
• commit-range gitleaks scan: no findings