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feat(proxy): count block refetches after failed cache writes - #250
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- A per-pod table remembers block keys whose populate was skipped at the write limit or whose PutBlock failed; a later upstream refetch of that block is counted by the earlier outcome.
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Counts upstream block refetches caused by an earlier lost cache write.
New:
tag_cache_block_refetch_total{previous}previouswrite_skippedwrite_failedPutBlockfailed, sync or detached branchPutBlockclears the block's slotBlockExistsrecheck, before slot acquisitionVerify
make lint-ci: cleanmake test: all 8 packages passwrite_skipped+1PutBlock, then refetch:write_failed+1 each