statusChangedAt returned in payload but not defined in openapi.yaml

[jeffmaury]

Describe the bug
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Server details returned a statusChangedAt in _meta block but it is not defined in the openapi.yaml schema file (see

registry/pkg/api/v0/types.go

Line 11 in 77bbd41

StatusChangedAt time.Time `json:"statusChangedAt" format:"date-time" doc:"Timestamp when the server status was last changed"`

)

To Reproduce
Steps to reproduce the behavior:

1. Go to https://registry.modelcontextprotocol.io and see the full server.json file for any entry

Expected behavior
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Adjsut types and schema

Logs
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Additional context
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