feat: Phase 2 complete — 13 Phases of COBOL type classification and test benchmark

P0.6: gcov infrastructure
P1: extract_structure output expansion (11 new feature fields)
P2: Confusion group rule engine (8 pairs + contradiction + backtrack)
P3: 4-factor confidence calculation + quality gate update
P4: 33+2 COBOL program type test samples (22 files, 7 categories)
P5: parametrized/ test data generation engine
P6: japanese_data.py lookup tables
P7-10: Type-specific test suites (~159 parametrized tests)
P11: Full classification pipeline (classify_program) + orchestrator integration
P12: Documentation (module-interfaces, test-plan v3.0, coverage-matrix)

Architecture decisions:
- classification_pipeline/ merged to hina/pipeline/
- parametrized/ as independent module
- japanese_data.py as root-level file
- hina/__all__ only exports classify_program()

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -1,11 +1,30 @@
-__pycache__/
-*.pyc
+
+# Build
+# Coverage
+# Python
 *.egg-info/
-dist/
-build/
+*.exe
+*.exec
+*.gcda
+*.gcno
+*.py,cover
+*.pyc
+.DS_Store
 .cache/
+.coverage
+.pytest_cache/
+__pycache__/
+build/
+coverage.json
+dist/
+htmlcov/
+reports/
+target/
+test-data-bundle/
+uploads/
+tasks/
+cobol_out.bin
+*.sh
 reports/
 test-data-bundle/
-*.exec
-target/
-.DS_Store
+cobol-javascreenshots/