Allow self-hosted relays to opt into wss:// (#767)

* Add relay TLS schema fields

* Wire relay TLS into websocket URLs

* Propagate relay TLS from pairing offers

* Expose relay TLS opt-in

* Mark relay TLS fallback for removal

* Preserve explicit relay TLS false

* Align relay TLS defaults outside config loader

docs/architecture.md

@@ -95,6 +95,7 @@ Enables remote access when the daemon is behind a firewall.
 - Relay server is zero-knowledge — it routes encrypted bytes, cannot read content
 - Client and daemon channels with identical API (`createClientChannel`, `createDaemonChannel`)
 - Pairing via QR code transfers the daemon's public key to the client
+- Self-hosted relays opt into TLS with `daemon.relay.useTls` or `PASEO_RELAY_USE_TLS=true`
 
 See [SECURITY.md](../SECURITY.md) for the full threat model.