Merge Workstream C: unlocks + inventory items + sigils + essence

backend/app/main.py

@@ -13,6 +13,7 @@ from app.config import settings
 from app.db import Base, async_session_maker, engine
 from app.routes.auth import router as auth_router
 from app.routes.codex import router as codex_router
+from app.routes.inventory import router as inventory_router
 from app.routes.shop import router as shop_router
 from app.session_cleanup import delete_expired_sessions
 from app.ws import AUDIO_DIR
@@ -64,6 +65,7 @@ async def lifespan(app: FastAPI):
 app = FastAPI(title="Quantumancy", lifespan=lifespan)
 app.include_router(auth_router)
 app.include_router(codex_router)
+app.include_router(inventory_router)
 app.include_router(shop_router)
 app.include_router(ws_router)