ci / vet-and-test (pull_request) Successful in 48s
Why: two-process HTTP acceptance (Dev tests/integration/multi-instance, added in the matching Dev-side change) exposed three real cross-instance defects that the U5 library-level tests bypassed via direct Manager calls, plus the U7 fault matrix needs explicit disk-full rejection evidence. Evidence: go test ./... green on SQLite and real PG (AGENT_PG_TEST_DSN); new regressions TestCrossInstanceResolveDoesNotSettleCard (runmgr, PG-gated), TestUploadRejectsCleanlyWhenObjectDirUnwritable and TestArtifactOverwriteRejectsCleanlyWhenObjectDirUnwritable (server). Impact: ResolveHITL no longer settles the card when the run executes on another instance (command-bus fallback stays available); cancelRun enqueues the command with the real conversation id and no longer reports a false local success; object-store failures now provably leave zero DB/object residue. Refs: collaboration storage proposal U7 (sections 3/5/7); task card feature/u7-load-fault-release.