Work items re-entering a runnable phase (ready/ready_for_rework) now have
ownership released unconditionally at the store layer: claim CAS no longer
consults metadata mirror keys (columns are the only ownership truth),
update_delegation_work_item blanks columns+mirror on any runnable-phase
write, review REJECT resolution releases ownership when the target phase is
runnable, and the startup sweep also covers runnable-phase residue. Closes
the 0011 rework livelock (stale four-field claim CAS vs. un-released claim).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
LZH-YS1998