feat(inventory): add spare parts management

backend/hermes/app/main.py

@@ -13,6 +13,7 @@ from app.api.auth import router as auth_router
 from app.api.audit import router as audit_router
 from app.api.customers import router as customers_router
 from app.api.dashboard import router as dashboard_router
+from app.api.inventory import router as inventory_router
 from app.api.knowledge import router as knowledge_router
 from app.api.permissions import router as permissions_router
 from app.api.repairs import router as repairs_router
@@ -41,6 +42,7 @@ app.include_router(users_router)
 app.include_router(roles_router)
 app.include_router(permissions_router)
 app.include_router(customers_router)
+app.include_router(inventory_router)
 app.include_router(knowledge_router)
 app.include_router(repairs_router)
 app.include_router(repair_estimates_router)