feat: entity relationship refactor — notification trackers, command system, chat actions

Rework entity schema: rename Tracker→NotificationTracker, add CommandConfig/
CommandTracker/CommandTrackerListener entities for decoupled command handling.
Commands now resolve through CommandTracker→CommandConfig instead of
TelegramBot.commands_config. Smart ref-counted bot polling based on active
listeners. Add chat_action to telegram targets. Full frontend CRUD pages
for command configs and command trackers. Idempotent SQLite migrations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/server/src/notify_bridge_server/main.py

@@ -15,8 +15,8 @@ from .database.models import *  # noqa: F401,F403 — ensure all models register
 
 from .auth.routes import router as auth_router
 from .api.providers import router as providers_router
-from .api.trackers import router as trackers_router
-from .api.tracker_targets import router as tracker_targets_router
+from .api.notification_trackers import router as notification_trackers_router
+from .api.notification_tracker_targets import router as notification_tracker_targets_router
 from .api.tracking_configs import router as tracking_configs_router
 from .api.template_configs import router as template_configs_router
 from .api.targets import router as targets_router
@@ -25,6 +25,8 @@ from .api.users import router as users_router
 from .api.status import router as status_router
 from .api.template_vars import router as template_vars_router
 from .api.app_settings import router as app_settings_router
+from .api.command_configs import router as command_configs_router
+from .api.command_trackers import router as command_trackers_router
 from .commands.webhook import router as webhook_router, set_webhook_secret
 
 
@@ -33,10 +35,11 @@ async def lifespan(app: FastAPI):
     await init_db()
     # Run data migrations (idempotent)
     from .database.engine import get_engine
-    from .database.migrations import migrate_schema, migrate_tracker_targets
+    from .database.migrations import migrate_schema, migrate_tracker_targets, migrate_entity_refactor
     engine = get_engine()
     await migrate_schema(engine)
     await migrate_tracker_targets(engine)
+    await migrate_entity_refactor(engine)
     await _seed_default_templates()
     # Configure webhook secret from DB setting (falls back to env var)
     from sqlmodel.ext.asyncio.session import AsyncSession as _AS
@@ -55,8 +58,8 @@ app = FastAPI(title="Notify Bridge", version="0.1.0", lifespan=lifespan)
 app.include_router(auth_router)
 app.include_router(template_vars_router)
 app.include_router(providers_router)
-app.include_router(trackers_router)
-app.include_router(tracker_targets_router)
+app.include_router(notification_trackers_router)
+app.include_router(notification_tracker_targets_router)
 app.include_router(tracking_configs_router)
 app.include_router(template_configs_router)
 app.include_router(targets_router)
@@ -64,6 +67,8 @@ app.include_router(telegram_bots_router)
 app.include_router(users_router)
 app.include_router(status_router)
 app.include_router(app_settings_router)
+app.include_router(command_configs_router)
+app.include_router(command_trackers_router)
 app.include_router(webhook_router)