[cherry-pick] Preserve model attribution for cached inline edits#325718
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Cherry-pick of #325704 from
main.Patch-based inline edit cache hits currently report
isFromCache = truewithoutmodelNameormodelConfig. This makes telemetry filtered by prompting strategy appear to have zero patch-model cache hits even though the cache is working.This change stores only model attribution on cache entries and restores it when emitting cache-hit telemetry. Request-specific prompt, response, latency, usage, and other stateless provider metrics remain unset. The coverage includes regular, subsequent/rebased, speculative, cross-file, and cached no-edit results.
Testing: