Add Japanese language analysis support

[lemur47]

Summary

• Marker registry (marker_registry.py) — new MarkerSet frozen dataclass and get_markers(lang) dispatch function with lazy loading and caching, making the core library language-aware and extensible
• Japanese markers (markers_ja.py) — all 12 marker categories culturally adapted for Japanese spiritual contexts (スピリチュアル, 霊感商法, カルト, 秘密結社, etc.)
• Multi-language pipeline — lang parameter ("en" | "ja", default "en") flows through tech_analysis(), hybrid_score(), CLI (--lang), and API (lang field on POST /analyse)
• NLP model cache — replaced singleton _nlp with _nlp_cache dict for per-language lazy loading (en_core_web_sm / ja_core_news_sm)
• CI — ja_core_news_sm model added to test matrix
• Strategy document — docs/STRATEGY.md articulating mission, SI definition, approach, audience, and roadmap
• Zero regressions — all existing English behaviour unchanged (default lang="en"); markers.py, output.py, test_markers.py, and test_output.py untouched

New files (6)

• src/si_protocols/marker_registry.py
• src/si_protocols/markers_ja.py
• tests/test_marker_registry.py
• tests/test_markers_ja.py
• examples/synthetic_suspicious_ja.txt
• docs/STRATEGY.md

Modified files (7)

• src/si_protocols/threat_filter.py — multi-model loading, lang param, marker dispatch
• app/schemas.py — lang field on AnalyseRequest
• app/main.py — pass lang through
• tests/test_threat_filter.py — Japanese fixture texts and test classes
• tests/test_api.py — Japanese API tests
• .github/workflows/ci.yml — install ja_core_news_sm
• CLAUDE.md — updated architecture and dev commands

Test plan

• 201 tests pass (up from 146), 99% coverage
• Ruff lint clean
• Ruff format clean
• Pyright 0 errors
• Bandit security scan clean
• All pre-commit hooks pass
• CI passes on Python 3.12 + 3.13
• Review Japanese markers for domain accuracy

🤖 Generated with Claude Code

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View logs

[lemur47]

I will be updating markers_ja.py later on.