fix agent_execution_metadata

[hieheihei]

Summary

Fixes #15463

fix tool_node msg_metadata TypeError

error msg:
File "/Users/xxxxxx/project/opensource/dify/api/core/workflow/nodes/tool/tool_node.py", line 273, in <dictcomp> key: value for key, value in msg_metadata.items() if key in NodeRunMetadataKey ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/enum.py", line 742, in __contains__ raise TypeError( TypeError: unsupported operand type(s) for 'in': 'str' and 'EnumType'

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Close issue syntax: Fixes #<issue number> or Resolves #<issue number>, see documentation for more details.

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Checklist

Important

Please review the checklist below before submitting your pull request.

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[crazywoola]

Hello, please link an existing issue in the description.

[laipz8200]

LGTM