Issue 1: repo scaffold and project structure

backend/ten31portal/main.py

@@ -0,0 +1,47 @@
+"""Ten31Portal FastAPI application."""
+
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from starlette.middleware.sessions import SessionMiddleware
+
+from ten31portal.config import SESSION_SECRET
+from ten31portal.db_init import run_migrations
+from ten31portal.routers.auth_router import router as auth_router
+from ten31portal.routers.audit_router import router as audit_router
+from ten31portal.routers.entity_router import router as entity_router
+from ten31portal.routers.holding_router import router as holding_router
+from ten31portal.routers.position_router import router as position_router
+from ten31portal.routers.round_router import router as round_router
+from ten31portal.routers.import_router import router as import_router
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    run_migrations()
+    yield
+
+
+app = FastAPI(title="Ten31Portal", version="0.1.0", lifespan=lifespan)
+app.add_middleware(SessionMiddleware, secret_key=SESSION_SECRET)
+app.include_router(auth_router)
+app.include_router(audit_router)
+app.include_router(entity_router)
+app.include_router(holding_router)
+app.include_router(position_router)
+app.include_router(round_router)
+app.include_router(import_router)
+
+
+@app.get("/api/health")
+def health() -> dict[str, str]:
+    return {"status": "ok"}
+
+
+def cli() -> None:
+    import uvicorn
+    uvicorn.run("ten31portal.main:app", host="0.0.0.0", port=8000, reload=True)
+
+
+if __name__ == "__main__":
+    cli()