refactor: centralize custom interaction IDs into constants

Replace all hardcoded custom ID strings with module-level constants.
Each module now has *_CUSTOM_IDS in its types file, using functions
for dynamic IDs and PREFIX for startsWith matching.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bot/modules/feedback/feedback.view.ts

@@ -14,7 +14,7 @@ import { FEEDBACK_TYPE_LABELS, FEEDBACK_CUSTOM_IDS, type FeedbackData, type Feed
 
 export function getFeedbackTypeMenu() {
     const select = new StringSelectMenuBuilder()
-        .setCustomId("feedback_select_type")
+        .setCustomId(FEEDBACK_CUSTOM_IDS.SELECT_TYPE)
         .setPlaceholder("Choose feedback type")
         .addOptions([
             {