- Convert ModerationService class to moderationService singleton
- Convert PruneService class to pruneService singleton
- Update all command files to use new singleton imports
- Update web routes to use new singleton imports
- Update tests for singleton pattern
- Remove getNextCaseId from tests (now private module function)
- Update all commands and events to fetch guild config once per execution
- Pass config to service methods that need it (ModerationService.issueWarning)
- Update terminal service to use guildSettingsService for persistence
- Remove direct imports of config for guild-specific settings
This consolidates configuration to database-backed guild settings,
eliminating the dual config system.
