fixed log before picker

[nirrozenbaum]

fix the 'unsupported type: map[types.Pod]float64"}' error at the end of the log line:

{"level":"Level(-4)","ts":"2025-05-15T16:43:38Z","caller":"scheduling/scheduler.go:199","msg":"Before running picker plugin","x-request-id":"...","request":"TargetModel: meta-llama/Llama-3.2-3B-Instruct, Critical: false, PromptLength: 388, Headers: map[...]","podsError":"json: unsupported type: map[types.Pod]float64"}

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[kfswain]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kfswain, nirrozenbaum

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