backend, frontend: prepare remote control: This is a series of changes necessary to prepare the implementation of remote control feature: - XEP-0166: add a `priority` attribute to `ApplicationData`: this is needed when several applications are working in a same session, to know which one must be handled first. Will be used to make Remote Control have precedence over Call content. - XEP-0166: `_call_plugins` is now async and is not used with `DeferredList` anymore: the benefit to have methods called in parallels is very low, and it cause a lot of trouble as we can't predict order. Methods are now called sequentially so workflow can be predicted. - XEP-0167: fix `senders` XMPP attribute <=> SDP mapping - XEP-0234: preflight acceptance key is now `pre-accepted` instead of `file-accepted`, so the same key can be used with other jingle applications. - XEP-0167, XEP-0343: move some method to XEP-0167 - XEP-0353: use new `priority` feature to call preflight methods of applications according to it. - frontend (webrtc): refactor the sources/sink handling with a more flexible mechanism based on Pydantic models. It is now possible to have has many Data Channel as necessary, to have them in addition to A/V streams, to specify manually GStreamer sources and sinks, etc. - frontend (webrtc): rework of the pipeline to reduce latency. - frontend: new `portal_desktop` method. Screenshare portal handling has been moved there, and RemoteDesktop portal has been added. - frontend (webrtc): fix `extract_ufrag_pwd` method. rel 436

type: docker-compose
prepare:
  git: https://github.com/WeblateOrg/docker-compose.git
files:
  settings-override.py:
    content: |
      USE_X_FORWARDED_HOST = True
override:
  version: "3"
  services:
    weblate:
      ports:
        - "8080"
      environment:
        WEBLATE_DEBUG: 0
        WEBLATE_URL_PREFIX: !libervia_param [url_prefix, /weblate]
        WEBLATE_EMAIL_HOST: !libervia_conf ["", "email_server"]
        WEBLATE_EMAIL_HOST_USER: !libervia_conf ["", "email_username"]
        WEBLATE_EMAIL_HOST_PASSWORD: !libervia_conf ["", "email_password"]
        WEBLATE_SERVER_EMAIL: !libervia_conf ["", "email_from", "weblate@example.com"]
        WEBLATE_DEFAULT_FROM_EMAIL: !libervia_conf ["", "email_from", "weblate@example.com"]
        WEBLATE_SITE_DOMAIN: !libervia_conf ["", "public_url"]
        WEBLATE_ADMIN_PASSWORD: !libervia_generate_pwd
        WEBLATE_ADMIN_EMAIL: !libervia_conf ["", "email_admins_list", "", "first"]
        WEBLATE_ENABLE_HTTPS: !libervia_conf ["", "weblate_enable_https", "1"]
      volumes:
        - ./settings-override.py:/app/data/settings-override.py:ro
expose:
  url_prefix: [override, services, weblate, environment, WEBLATE_URL_PREFIX]
  front_url: !libervia_param [front_url, /translate]
  web_label: Translate
  ports:
    web:
      service: weblate
      private: 8080
  passwords:
    admin: [override, services, weblate, environment, WEBLATE_ADMIN_PASSWORD]