v0.3.0

eb-staged-rebuild 0.3.0 directory-swap safety.

Pair the local flock lock with a POSIX record lock on .lock.posix. Module-file replacement keeps ownership, mode, and the listed access-control-list bytes, and refuses a stale temporary. Drain the build process group before the writer lock is released. Garbage collection refuses an unreadable tracked module and stays on that sibling's filesystem. A directory swap is recorded in an eb-stack ledger without reading a generation journal: schema 4 when a ledger policy is frozen, schema 2 otherwise; schema 1 and schema 3 are refused.

open-004 is still unvalidated. Cross-node locking and behavior on the General Parallel File System are not measured. Recorded checks use ext4.