MCP server doesn't properly handle Flux responses.

[elvis-cai]

Issue submitter TODO list

• I've searched for an already existing issues here
• I'm running a supported version of the application which is listed here and the feature is not present there

Is your proposal related to a problem?

Endpoints that return Flux responses, including listAcls, listQuotas, listStreams, and others.
Jackson can't serialize an active Flux stream, so it serializes the Flux's internal metadata properties instead, which is {"scanAvailable": true, "prefetch": -1}.

Describe the feature you're interested in

fix the mcp serialize issue

Describe alternatives you've considered

No response

Version you're running

ghcr.io/kafbat/kafka-ui:v1.3.0

Additional context

No response

[github-actions]

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