feat: add durable WorldQuant backtests with UI and AI confirmation

backend/app/main.py

@@ -16,11 +16,12 @@ from sqlalchemy import delete, select, text
 from .ai.routes import router as ai_router
 from .ai.runtime import AIRuntime
 from .alphas import list_statement, sorted_statement
+from .backtests.routes import router as backtest_router
 from .business import Business, notify_job
 from .config import Settings
 from .db import create_database
 from .jobs import AUTH_KINDS, Runner, create_job
-from .models import Account, Admin, Job, JobItem, LoginSession
+from .models import Account, Admin, BacktestConfig, Job, JobItem, LoginSession
 from .schemas import (
     AccountOutput,
     AlphaDetail,
@@ -87,6 +88,9 @@ def create_app(settings=None, wq_client=None, ai_model_factory=None):
     async def lifespan(app):
         async with sessions() as db:
             await bootstrap(db, settings)
+        async with sessions.begin() as db:
+            if not await db.get(BacktestConfig, 1):
+                db.add(BacktestConfig(id=1))
         await ai_runtime.start()
         if settings.enable_runner:
             await runner.start()
@@ -380,6 +384,7 @@ def create_app(settings=None, wq_client=None, ai_model_factory=None):
         await notify_job(runner, "retry_job", result)
         return result
 
+    app.include_router(backtest_router)
     app.include_router(api)
     app.include_router(ai_router(ai_runtime))
     return app