refactor: migrate all code to use getGuildConfig() for guild settings

- 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.

shared/modules/economy/lootdrop.service.ts

@@ -116,7 +116,7 @@ class LootdropService {
             });
 
             // Trigger Terminal Update
-            terminalService.update();
+            terminalService.update(channel.guildId);
 
         } catch (error) {
             console.error("Failed to spawn lootdrop:", error);
@@ -153,7 +153,7 @@ class LootdropService {
                 `Claimed lootdrop in channel ${drop.channelId}`
             );
 
-            // Trigger Terminal Update
+            // Trigger Terminal Update (uses primary guild from env)
             terminalService.update();
 
             return { success: true, amount: drop.rewardAmount, currency: drop.currency };