- Add a fallback to p2p if disconnected from the SFU while still being
in the call or after a 5 seconds timeout.
- Add logging where:
    * We obtain a track from a peer or the SFU
    * The state of the SFU connection changes
    * Our rtcSession is removed from the Odoo server
    * The peer-to-peer connections attempt connection recoveries
- Raise the default log level of peer-to-peer to `WARN`
- Add an `important` option to rtc logging so that logs that are
important are recorded even without activating the logging setting.
- Remove the generated error trade for logs as it added a lot of noise
  and the message itself should be enough.
- Add logging snapshots of p2p and sfu when disconnecting and
  downloading the logs.
- Remove the reactive session cleanup as it is redundant
with the `onDelete` of the `thread/rtcSessions` field.
- Remove `rtc.state.serverState` and put it as the `connectionState`
of `selfSession`.
- Await the peer to be ready before sending the tracks.
- Add a new p2p state "searching for network" to make it easier to know
  when the connection is stuck where we may need TURN/SFU through a
  difficult network.
- Prevent possible traceback when receiving a track for a missing
session in peer-to-peer.