Orphan walk
First Tier 2 deliverable. Resolves consumer-agent parentEntityKey references against current Orchestrator state.
What this does
Walks Comms's and Experience's Tier 1 static extractions, attempts to resolve each
parentEntityKey in producedArtifacts against the current Orchestrator plan records. Surfaces three numbers per consumer: resolvable (parent exists), orphan (parent doesn't exist), unresolvable (placeholder slots in parent key — expected pre-lineage-epic). Results written to m5_ops_tier2_orphan_walk_<isoTimestamp>.