fix(telemetry): populate missing fields in node execution trace

- Extract model_provider/model_name from process_data (LLM nodes store
  model info there, not in execution_metadata)
- Add invoke_from to node execution trace metadata dict
- Add credential_id to node execution trace metadata dict
- Add conversation_id to metadata after message_id lookup
- Add tool_name to tool_info dict in tool node

api/core/workflow/nodes/tool/tool_node.py

@@ -60,6 +60,7 @@ class ToolNode(Node[ToolNodeData]):
         tool_info = {
             "provider_type": self.node_data.provider_type.value,
             "provider_id": self.node_data.provider_id,
+            "tool_name": self.node_data.tool_name,
             "plugin_unique_identifier": self.node_data.plugin_unique_identifier,
             "credential_id": self.node_data.credential_id,
         }