[Server] Add room chat channels with per-channel fan-out and history (#7476)

* [Server] Add room chat channels with per-channel fan-out and history

* Fixup: redact all channel histories on message removal

removeSaidMessages only redacted the main history, so banned/warned
content stayed visible to late joiners on every other channel.
Drop the unused channelId parameter and redact up to amount messages
per channel across the whole channelChatHistory map.

* [Server] Validate room channel ids and fix catalog schema per review

- servatrice.sql: expand rooms_channels access_level enum to full set
  to match 0037->0038 migration
- servatrice.cpp: skip empty, reserved (__main__) and duplicate channel
  ids when loading from ini and DB with qWarning
- server_protocolhandler.cpp: clarify catalog replay comment (filtering
  happens in moderator stack)
- server_room: drop duplicate channelIndex, linear search preserves
  catalog order

* [Server] Fix server_room.cpp formatting per clang-format-18

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
Co-authored-by: BruebachL <bruebachl@cockatrice.example>

libcockatrice_network/libcockatrice/network/server/remote/server.cpp

@@ -451,7 +451,7 @@ void Server::externalRoomSay(int roomId, const QString &userName, const QString
         qDebug() << "externalRoomSay: room id=" << roomId << "not found";
         return;
     }
-    room->say(userName, message, false);
+    room->say(userName, message, QString(), false);
 
     getDatabaseInterface()->logMessage(0, userName, "ISL", message, Server_DatabaseInterface::MessageTargetIslRoom,
                                        room->getId(), room->getName());