fix: audit result corrections

Author: sqhell

src/canton_mcp_server/canton_billing.py

@@ -893,6 +893,7 @@ def _extract_charge_manager(contract_id: str, _payload: dict, _created_at: str)
 
         # No ChargeManager exists, create one using submit-and-wait-for-transaction
         logger.info("Creating new ChargeManager contract...")
+        template_id = f"{BILLING_PACKAGE_ID}:MCP.Billing:ChargeManager"
 
         create_data = await _make_ledger_request(
             "POST",