swarm options: no swarm.* value depends on a deploy option or this host's hive

- swarm.serviceDomains lists every swarm service name on every host. The
  store's issuing role is built from it, so the store now admits a leaf
  for grafana, metrics, otel, logs, the bao UI and the apex whichever host
  runs the store. Each gateway's own leaf stays narrowed by
  localServiceDomains.
- swarm.matrix.apiUrl defaults to http://<swarm.matrix.gatewayHost>
  (null when gatewayHost is null) instead of loopback on the matrix host.
- The authelia vhost proxies /bridge/ to swarm-authelia-bridge with the
  prefix stripped, and deploy.swarm-controller.authBridgeUrl defaults to
  ${swarm.authelia.url}/bridge on every host. swarm.authelia.bridgeUrl is
  removed.
- swarm-authelia-bridge admits only swarm-controller's OIDC client on
  every request (403 for any other active token), configured by
  SWARM_AUTHELIA_BRIDGE_CONTROLLER_CLIENT_ID (renamed from
  ..._OPERATOR_READER_CLIENT_ID, which gated ListOperators alone).
- swarm.peerHives is removed; swarm-wireguard.nix filters this host's own
  hive out of swarm.hives itself.

Closes #4933

swarm-controller/src/auth.rs

@@ -11,9 +11,9 @@
 //! connection attempt: no window in which this process holds a token
 //! that outlives its intended use.
 //!
-//! `None` when this deployment did not wire a bridge up — the bridge only
-//! exists on hosts that also run `swarm-authelia`, so a controller split
-//! from it can neither create an identity nor read the roster.
+//! `None` when this deployment set no bridge address; the default is the
+//! `/bridge/` location on the authelia vhost, from every host. Without one,
+//! this daemon can neither create an identity nor read the roster.
 //!
 //! Each caller answers that absence in its own terms rather than this
 //! module inventing a shared one: `SwarmNodeKind::CreateIdentity` fails