Function assert_daemon_store_identities 

pub fn assert_daemon_store_identities(guards: &[DaemonStoreGuard]) -> Result<()>

Fail boot if a canonical path no longer names its descriptor-bound file. Daemon backend constructors also pass each held descriptor’s identity to the pool, which checks the SQLite-opened file before identity initialization and WAL setup. This final path check precedes schema preparation and serving.