feat(shipote): throughput + stats persistente + auth peer (fase P)
- FlowMeter (atomic u64 + rolling window 32 samples) en cada FlowChannel.
flow_throughput() → (socket, bytes_total, bytes_per_sec). CLI:
shipote flow throughput. Idle threshold 5s = rate 0.0.
- Snapshot v4 con stats_history persistente por workspace (cap 16).
PersistedStats separado para evitar Instant. Restore hidrata el VecDeque
con source="persisted".
- Auth SO_PEERCRED: daemon rechaza peers con uid distinto al propio.
SHIPOTE_TRUST_ANYONE=1 = escape hatch documentado.
84 tests pasan (ente-incarnate 16, nouser-core 27, shipote-card 8,
shipote-core 25, shipote-discern 5, yahweh-provider-fs 3).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
sergio
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