Providers emitted identifiers and field keys that decodeSnapshot never
looked up, leaving CPU/kernel/load/disk sections zeroed and memory%,
storage%, network, process RSS, and fan fields decoded as zero.
Store-side decode now reads the emitted schema; providers gain the
previously-missing fields: network isUp (IFF_UP via getifaddrs), process
isStopped/isZombie (pbi_status), fan name (F{i}ID). Memory utilization is
computed as used/total in the decoder. decodeSnapshot is internal for
@testable access; new MMSnapshotContractTests cover the emitted-key
contract with synthetic dictionaries (93 tests total, 0 failures).
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
gronodandDevin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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