cleanupPendingRequests() iterated the service-wide pendingRequests Map
and rejected every entry. Since it was called from connectUser's catch
block (a per-user error path), one user's connection failure would
spuriously reject other users' in-flight verify RPCs.
The call was also redundant: sendVerifyRpc already cleans up its own
entry in all failure paths (timeout, RPC error, route failure).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>