master
SimDataFormats,PhysicsTools: encapsulate truth-graph data members
Hit index: keep the shared store off until its consumers are migrated
TruthInfo: add author headers and prototype-status notice
Truth graph: close three gaps a review found in the GEN and index paths
Walk the hit-index tree through GEN-only bridges, and never fall back quietly
PhysicsTools/TruthInfo: read subgraph hits through a layout-agnostic view