fix: sync upstream large workflow messages

Carry the follow-up from paradigmxyz#1238 at b5a32b7 so pipe-backed workflow hosts accept protocol messages larger than 64 KiB.

fix: prefer reviewed overlay image tools

fix: prefer reviewed overlay image tools

fix: prefer reviewed overlay image tools

Use an async mutex for session context env isolation

Narrow Slack changes to fail-closed proxy hardening

fix(api-rs): retry proxy principal assignment transport failures

Retry the idempotent Iron Control proxy-principal PATCH once after a transport failure. Keep all generic writes and non-idempotent proxy creation single-attempt, with focused dropped-connection coverage.

Fix reviewed image publication after merge

Bind exact-head workflow runs to the reviewed repository and branch even when GitHub clears the run-level pull_requests array after merge.

Preserve TipLink migration lineage for Granola IDs

Keep the immutable TipLink 0045 checksum and adopt upstreams canonical Granola document IDs with a forward-only 0047 migration.

test: remove retired delivery receipt fixtures