dispose method

void dispose()

Drops the lease and puts the flag back, for a host that is shutting down.

The bridge stays disposed: a request already parked in a gate resumes into a bridge that refuses rather than one that installs a switch nobody is left to release. Idempotent.

Implementation

void dispose() {
  _disposed = true;
  _release(PatchbayInspectReleaseWire.disposed);
}