Stage 9: ban history — backend service, router, frontend history page

- history.py models: HistoryBanItem, HistoryListResponse, IpTimelineEvent, IpDetailResponse
- history_service.py: list_history() with dynamic WHERE clauses (range/jail/ip
  prefix/all-time), get_ip_detail() with timeline aggregation
- history.py router: GET /api/history + GET /api/history/{ip} (404 for unknown)
- Fixed latent bug in ban_service._parse_data_json: json.loads('null') -> None
  -> AttributeError; now checks isinstance(parsed, dict) before assigning obj
- 317 tests pass (27 new), ruff + mypy clean (46 files)
- types/history.ts, api/history.ts, hooks/useHistory.ts created
- HistoryPage.tsx: filter bar (time range/jail/IP), DataGrid table,
  high-ban-count row highlighting, per-IP IpDetailView with timeline,
  pagination
- Frontend tsc + ESLint clean (0 errors/warnings)
- Tasks.md Stage 9 marked done

backend/app/main.py

@@ -33,7 +33,7 @@ from starlette.middleware.base import BaseHTTPMiddleware
 
 from app.config import Settings, get_settings
 from app.db import init_db
-from app.routers import auth, bans, config, dashboard, geo, health, jails, server, setup
+from app.routers import auth, bans, config, dashboard, geo, health, history, jails, server, setup
 from app.tasks import health_check
 
 # ---------------------------------------------------------------------------
@@ -278,5 +278,6 @@ def create_app(settings: Settings | None = None) -> FastAPI:
     app.include_router(geo.router)
     app.include_router(config.router)
     app.include_router(server.router)
+    app.include_router(history.router)
 
     return app