WAL hooks now write real Cap'n Proto payloads instead of stub uint32_t:
- WAL_JOB_SUBMIT: full xce_job_t serialized via encode_Job/write_Job
- WAL_WORKER_CTRL: [uint32_t detail][xce_worker_t capnp] via encode_Worker
- Other job events (START/FINISH/FAIL/STOP etc): uint64_t jobid only
restore_job(): deserializes Cap'n Proto xce_job_t, guards against duplicate
replay with key_find check, then calls create_job()
worker_from_capnp(): skips 4-byte detail prefix, deserializes xce_worker_t,
guards against duplicate replay, then calls restore_worker()
join.c: pass worker_t* (looked up by idx via vget) to WORKER_JOIN hook
so persist hook can serialize worker data without touching workermgr RTTI
Rongsong Shen
9b6a91a89e