Data Structures

Here are the data structures with brief descriptions:

CGAction	Registers GEMC user actions for worker threads, sequential execution, and the master thread
CGEventAction	Handles event begin/end callbacks, hit digitization, and event-level publication
CGPrimaryGeneratorAction	Generates the primary vertices for each Geant4 event
CGRun	Thread-local run object created by the GEMC run action
CGRunAction	Handles run begin/end callbacks and creates the thread-local GRun object
CGTrackingAction	Records initial track provenance for one Geant4 worker
CGTrackProvenance	Worker-local, event-scoped track ancestry registry
CGTrackRecord	Immutable initial information recorded for one Geant4 track