Incident 2026-06-24: scheduled IPFS GC (0.122.67) deleted the WASM of 14 active
functions that were never durably pinned (old uploadWASM only warn-logged pin
failures). 0.122.68 fixed the deploy path (pin-everywhere + hard-fail); this
adds the missing piece for EXISTING functions:
- Registry.RepinAllWASM re-pins every active function's WASM cluster-wide
(replication=-1), best-effort + idempotent (gone/GC-deleted blocks are logged
and skipped, surviving ones protected).
- Runs as a delayed background goroutine on gateway startup so every function's
WASM is durably pinned + GC-safe without manual intervention; the
rolling-restart cadence naturally staggers it and the cluster dedups pins.
So GC can never again reclaim function WASM. (The currently-deleted 14 still need
an AnChat re-deploy — their bytes are gone; tracked on bug #137.)
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