- Remove auto-add logic that granted file_writer permission to the first
group/guild member who chatted with the bot
- Add ConfigTypeFileWriter and ConfigTypeHeartbeat constants, replace all
hardcoded config_type strings across callers
- Add bootstrap exception: /addwriter and !addwriter allow first writer
to be added when no writers exist yet
- Optimize writer commands: reuse cached ListFileWriters result for both
permission check and last-writer guard, reducing DB queries per command
- Add freshness directive to file writer system prompt so bot prioritizes
current list over stale references in conversation history
viettranx
39bb90bd60