Add game channel redirect feature and sexual_vulgar detection

Detect when users discuss a game in the wrong channel (e.g. GTA talk
in #warzone) and send a friendly redirect to the correct channel.
Also add sexual_vulgar category and scoring rules so crude sexual
remarks directed at someone aren't softened by "lmao".

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config.yaml

@@ -19,6 +19,12 @@ sentiment:
   rolling_window_minutes: 15  # Time window for tracking
   cooldown_between_analyses: 2  # Seconds between analyzing same user's messages
 
+game_channels:
+  gta-online: "GTA Online"
+  battlefield: "Battlefield"
+  warzone: "Call of Duty: Warzone"
+  cod-zombies: "Call of Duty: Zombies"
+
 topic_drift:
   enabled: true
   remind_cooldown_minutes: 10  # Don't remind same user more than once per this window
@@ -37,6 +43,7 @@ messages:
   topic_remind: "Hey {username}, this is a gaming server \U0001F3AE — maybe take the personal stuff to DMs?"
   topic_nudge: "{username}, we've chatted about this before — let's keep it to gaming talk in here. Personal drama belongs in DMs."
   topic_owner_dm: "Heads up: {username} keeps going off-topic with personal drama in #{channel}. They've been reminded {count} times. Might need a word."
+  channel_redirect: "Hey {username}, that sounds like {game} talk — head over to {channel} for that!"
 
 coherence:
   enabled: true