Fix hybrid seeding to use template engine and add generate_config alias

agent/config_templates.py

@@ -455,6 +455,10 @@ class ConfigTemplateEngine:
         device_name = device.get('name') if isinstance(device, dict) else device.name
         logger.info(f"Generated config for {device_name} using template {template_name}")
         return config
+
+    # Backward-compatible alias used by some callers
+    def generate_config(self, device: Any, network_context: Optional[Dict[str, Any]] = None) -> str:
+        return self.generate_device_config(device, network_context)
     
     def _select_template(self, device: Any) -> str:
         """

agent/pipeline_engine.py

@@ -1311,13 +1311,15 @@ Be specific and practical. Use RFC1918 addressing. Consider scalability and secu
                 seeded = False
                 if deploy_mode in ("hybrid", "gns3") and project_for_seed:
                     from agent.network_ops import seed_gns3_node_config
+                    # Generate config for seeding via GNS3
+                    cfg_text = deployment_engine.template_engine.generate_device_config(
+                        device=device,
+                        network_context=network_context
+                    )
                     seed_resp = seed_gns3_node_config(
                         project_name=project_for_seed["name"],
                         device_name=device.name,
-                        config=deployment_engine.template_engine.generate_config(
-                            device=device,
-                            network_context=network_context
-                        )
+                        config=cfg_text
                     )
                     seed_results.append({
                         "device": device.name,