Function cbm_watcher_root_missing_errno

src/watcher/watcher.c:867–876

/* ── Stale-root pruning (#286) ──────────────────────────────────── */

bool cbm_watcher_root_missing_errno(int err) {
    /* Only ENOENT/ENOTDIR mean the root itself is gone. Anything else
     * (EACCES, EIO, ELOOP, a transient network mount, macOS TCC permission
     * revocation) is uncertainty: the directory may still exist even though
     * we cannot see it right now — never treat it as a deletion signal.
     * Windows (mingw/UCRT) maps ERROR_FILE_NOT_FOUND / ERROR_PATH_NOT_FOUND
     * to ENOENT, so the same check holds there (same convention as
     * find_deleted_files in pipeline_incremental.c). */
    return err == ENOENT || err == ENOTDIR;
}

typedef enum {
    ROOT_PRESENT = 0, /* stat succeeded and the root is a directory */