feat: move user aliases from config to DB with /bcs-alias command

Aliases now stored in UserState table instead of config.yaml. Adds
Aliases column (NVARCHAR 500), loads on startup, persists via flush.
New /bcs-alias slash command (view/set/clear) for managing nicknames.

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

cogs/sentiment/__init__.py

@@ -253,18 +253,18 @@ class SentimentCog(commands.Cog):
         """Replace display name keys with anonymous keys in user notes map."""
         return {anon_map.get(name, name): notes for name, notes in user_notes_map.items()}
 
-    @staticmethod
     def _build_alias_context(
+        self,
         messages: list[discord.Message],
         anon_map: dict[str, str],
-        alias_config: dict,
     ) -> str:
         """Build anonymized alias context string for the LLM.
 
-        Maps user IDs from messages to their known nicknames using the
-        config, then replaces display names with anonymous keys.
+        Maps user IDs from messages to their known nicknames from
+        DramaTracker, then replaces display names with anonymous keys.
         """
-        if not alias_config:
+        all_aliases = self.bot.drama_tracker.get_all_aliases()
+        if not all_aliases:
             return ""
         lines = []
         seen_ids: set[int] = set()
@@ -273,14 +273,13 @@ class SentimentCog(commands.Cog):
             if uid in seen_ids:
                 continue
             seen_ids.add(uid)
-            aliases = alias_config.get(uid)
+            aliases = all_aliases.get(uid)
             if aliases:
                 anon_key = anon_map.get(msg.author.display_name, msg.author.display_name)
                 lines.append(f"  {anon_key} is also known as: {', '.join(aliases)}")
         # Also include aliases for members NOT in the conversation (so the LLM
         # can recognize name-drops of absent members)
-        for uid, aliases in alias_config.items():
-            uid = int(uid) if isinstance(uid, str) else uid
+        for uid, aliases in all_aliases.items():
             if uid not in seen_ids:
                 lines.append(f"  (not in chat) also known as: {', '.join(aliases)}")
         return "\n".join(lines) if lines else ""
@@ -498,8 +497,7 @@ class SentimentCog(commands.Cog):
         anon_conversation = self._anonymize_conversation(conversation, anon_map)
         anon_notes = self._anonymize_notes(user_notes_map, anon_map) if user_notes_map else user_notes_map
 
-        alias_config = config.get("user_aliases", {})
-        alias_context = self._build_alias_context(all_messages, anon_map, alias_config)
+        alias_context = self._build_alias_context(all_messages, anon_map)
 
         channel_context = build_channel_context(ref_message, game_channels)
 
@@ -675,8 +673,7 @@ class SentimentCog(commands.Cog):
         anon_conversation = self._anonymize_conversation(conversation, anon_map)
         anon_notes = self._anonymize_notes(user_notes_map, anon_map) if user_notes_map else user_notes_map
 
-        alias_config = config.get("user_aliases", {})
-        alias_context = self._build_alias_context(raw_messages, anon_map, alias_config)
+        alias_context = self._build_alias_context(raw_messages, anon_map)
 
         channel_context = build_channel_context(raw_messages[0], game_channels)
         mention_context = (

cogs/sentiment/state.py

@@ -4,6 +4,11 @@ import logging
 logger = logging.getLogger("bcs.sentiment")
 
 
+def _aliases_csv(user_data) -> str | None:
+    """Convert aliases list to comma-separated string for DB storage."""
+    return ",".join(user_data.aliases) if user_data.aliases else None
+
+
 def save_user_state(bot, dirty_users: set[int], user_id: int) -> None:
     """Fire-and-forget save of a user's current state to DB."""
     user_data = bot.drama_tracker.get_user(user_id)
@@ -16,6 +21,7 @@ def save_user_state(bot, dirty_users: set[int], user_id: int) -> None:
         user_notes=user_data.notes or None,
         warned=user_data.warned_since_reset,
         last_offense_at=user_data.last_offense_time or None,
+        aliases=_aliases_csv(user_data),
     ))
     dirty_users.discard(user_id)
 
@@ -37,5 +43,6 @@ async def flush_dirty_states(bot, dirty_users: set[int]) -> None:
             user_notes=user_data.notes or None,
             warned=user_data.warned_since_reset,
             last_offense_at=user_data.last_offense_time or None,
+            aliases=_aliases_csv(user_data),
         )
     logger.info("Flushed %d dirty user states to DB.", len(dirty))