Move the test-only runtimeCommandParameters adapter to the test helper
file; route snapshot-decoded optional slices through cloneOptionalStrings
so wire structs are never aliased into typed specs; drop three dead
annotation aliases; collapse the triplicated catalog/surface hash
stamping into stampSnapshotHashes; make registry-vs-command validation
iterate in sorted order; guard the enum mcp candidate with hasPinned
like its siblings; refresh stale discovery-era comments.