fix: add missing database commit and remove unused agent service files

- Add conn.commit() to agent registration in agent-registry
- Remove unused integration_layer.py and coordinator.py from agent-services
- Fix blockchain RPC endpoint from /rpc/sync to /rpc/syncStatus
- Replace Annotated[Session, Depends(get_session)] with Session = Depends(get_session) for cleaner dependency injection syntax across marketplace routers

test_error.py

@@ -0,0 +1,23 @@
+import sys
+import asyncio
+from sqlmodel import Session, create_engine
+from app.services.marketplace_enhanced_simple import EnhancedMarketplaceService
+from app.database import engine
+from app.domain.marketplace import MarketplaceBid
+
+async def run():
+    with Session(engine) as session:
+        # insert a bid to test amount vs price
+        bid = MarketplaceBid(provider="prov", capacity=10, price=1.0)
+        session.add(bid)
+        session.commit()
+        
+        service = EnhancedMarketplaceService(session)
+        try:
+            res = await service.get_marketplace_analytics(period_days=30, metrics=["volume", "revenue"])
+            print(res)
+        except Exception as e:
+            import traceback
+            traceback.print_exc()
+
+asyncio.run(run())