generator: fix gold_ops_for_events double-application bug; single-state implementation

generator: temporal answer uses slot-held value; gold ADD evicts first when ledger full; budget default 12 for eviction pressure

generator: remove module-global session index; question targets restricted to ledger-supported predicates

CLERK generator: correct single-pass timeline builder, ledger-aware question targets, eviction-safe gold ops

CLERK generator: clean full rewrite of render_session and persona timeline builder

CLERK synthetic evolving-session generator: personas, updates/supersessions/tombstones, gold ledger transitions, seeded