fix: mutex leak, errno-after-free, log_perror misuse, status validation

- multiprocessing: destroy mutex_progress on the dir_entries_mutex
  init-failure path (init >= 7); drop bogus log_perror
- delete_plan: capture errno before free() in apply_deferred_path
- queue/array_list: log_message instead of log_perror for non-errno
  conditions
- protocol: reject unknown wire Status values via status_is_valid() in
  receive_status, receive_status_timed and the keepalive reader; declare
  protocol_receive_status_timed in protocol.h
- protocol: %llu for unsigned long long debug counters
- tests: out-of-range status rejection test

src/shared/delete_plan.c

@@ -988,10 +988,11 @@ static bool apply_deferred_path(DeletePlanSession* session, const Config* config
     return false;
   char* leaf = NULL;
   int parent_fd = file_open_secure_parent(full, &leaf, false);
+  int open_errno = errno;
   free(full);
   if (parent_fd < 0) {
     free(leaf);
-    return errno == ENOENT || errno == ENOTDIR;
+    return open_errno == ENOENT || open_errno == ENOTDIR;
   }
   struct stat st;
   if (fstatat(parent_fd, leaf, &st, AT_SYMLINK_NOFOLLOW) != 0) {