feat(netbird): manifest-driven migration via reusable orchestrator primitives

Migrate the netbird stack (server/dashboard/proxy) off ~500 lines of per-app Rust
to 3 declarative manifests, adding 4 reusable primitives:
- SecretGenKind::Base64 (netbird relay authSecret + sqlite store encryptionKey)
- GeneratedCert schema + ensure_manifest_certs (self-signed TLS so the dashboard
  gets a secure context for OIDC PKCE — issue #15; https proxy on 8087 preserved)
- templated GeneratedFile render: {{HOST_IP}}/{{HOST_MDNS}}/{{NETWORK_GATEWAY}}
  (aardvark resolver for the #15 stale-IP fix) /{{secret:NAME}} (never logged)
- legacy create_container now honours port.protocol (3478/udp STUN)
install_netbird_stack routes via the orchestrator first (legacy kept as fallback,
mirroring indeedhub); launch URL derives https://{host_ip}:8087 from host facts.
Legacy Rust deletion deferred to post-live-verify.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/container/src/podman_client.rs

@@ -124,7 +124,9 @@ impl PodmanClient {
             "nginx-proxy-manager" => "http://localhost:8081",
             "fedimint-gateway" => "http://localhost:8176",
             "endurain" => "http://localhost:8080",
-            "netbird" => "http://localhost:8087",
+            // HTTPS: netbird's dashboard needs a secure context for OIDC PKCE
+            // (window.crypto.subtle), so the proxy serves TLS on 8087 (issue #15).
+            "netbird" => "https://localhost:8087",
             "electrs" | "archy-electrs-ui" => "http://localhost:50002",
             _ => return None,
         };
@@ -275,10 +277,18 @@ impl PodmanClient {
         // Build the container spec for the API
         let mut port_mappings = Vec::new();
         for port in &manifest.app.ports {
+            // Honour the manifest's protocol (default tcp). netbird's STUN port
+            // is 3478/udp; forcing tcp here would publish the wrong protocol and
+            // silently break relay discovery.
+            let protocol = match port.protocol.to_ascii_lowercase().as_str() {
+                "udp" => "udp",
+                "sctp" => "sctp",
+                _ => "tcp",
+            };
             port_mappings.push(serde_json::json!({
                 "container_port": port.container,
                 "host_port": port.host,
-                "protocol": "tcp",
+                "protocol": protocol,
             }));
         }