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.

bot/commands/feedback/feedback.ts

@@ -1,6 +1,6 @@
 import { createCommand } from "@shared/lib/utils";
 import { SlashCommandBuilder } from "discord.js";
-import { config } from "@shared/lib/config";
+import { getGuildConfig } from "@shared/lib/config";
 import { createErrorEmbed } from "@/lib/embeds";
 import { getFeedbackTypeMenu } from "@/modules/feedback/feedback.view";
 
@@ -9,8 +9,10 @@ export const feedback = createCommand({
         .setName("feedback")
         .setDescription("Submit feedback, feature requests, or bug reports"),
     execute: async (interaction) => {
+        const guildConfig = await getGuildConfig(interaction.guildId!);
+
         // Check if feedback channel is configured
-        if (!config.feedbackChannelId) {
+        if (!guildConfig.feedbackChannelId) {
             await interaction.reply({
                 embeds: [createErrorEmbed("Feedback system is not configured. Please contact an administrator.")],
                 ephemeral: true