fix(bridge): system audit + 5-file bug fix — PATS Deny trigger removal, auto_resolved chat dedup, UUID filenames, IP rate limit leak, bot.py deque

bot.py

@@ -11,6 +11,7 @@ import asyncio
 import json
 import logging
 import time
+from collections import deque
 from datetime import datetime, timezone
 from pathlib import Path
 
@@ -180,7 +181,7 @@ class GravityBot(commands.Bot):
         self.session_category: discord.CategoryChannel | None = None
         self.guild: discord.Guild | None = None
         self.auto_approve_projects: set[str] = set()  # projects with auto-approve enabled
-        self._processed_message_ids: set[int] = set()  # dedup for Gateway event replay
+        self._processed_message_ids: deque[int] = deque(maxlen=200)  # dedup for Gateway event replay
         self._approval_messages: dict[str, int] = {}  # FIX #4: request_id → discord message_id (for auto_resolved lookup)
         self.gateway = None  # Set by main.py in gateway mode
 
@@ -800,12 +801,7 @@ class GravityBot(commands.Bot):
         # Dedup: Discord Gateway can deliver MESSAGE_CREATE twice on reconnection
         if message.id in self._processed_message_ids:
             return
-        self._processed_message_ids.add(message.id)
-        # Keep set bounded (last 200 messages)
-        if len(self._processed_message_ids) > 200:
-            excess = len(self._processed_message_ids) - 100
-            for _ in range(excess):
-                self._processed_message_ids.pop()
+        self._processed_message_ids.append(message.id)
 
         # Determine project from channel
         project = self.channel_to_project.get(message.channel.id)