ci: GitLab-Pipeline - build_embedded + manueller npm-Publish nach rohana (threadnet-call#1)

Registry-Entscheidung evidenzbasiert: das Package ist pnpm-Dependency von
ThreadNet-Webs apps/web, der Lockfile pinnt die Tarball-URL auf rohana -
Registry bleibt dort. Publish-Auth ueber CI-Variable GITEA_NPM_TOKEN statt
lokaler Klartext-.npmrc.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

config/config.devenv.json

@@ -0,0 +1,19 @@
+{
+  "default_server_config": {
+    "m.homeserver": {
+      "base_url": "https://synapse.m.localhost",
+      "server_name": "synapse.m.localhost"
+    }
+  },
+  "features": {
+    "feature_use_device_session_member_events": true
+  },
+  "ssla": "https://static.element.io/legal/element-software-and-services-license-agreement-uk-1.pdf",
+  "matrix_rtc_session": {
+    "wait_for_key_rotation_ms": 3000,
+    "membership_event_expiry_ms": 180000000,
+    "delayed_leave_event_delay_ms": 18000,
+    "delayed_leave_event_restart_ms": 4000,
+    "network_error_retry_ms": 100
+  }
+}