feat(#709): add configured Discord interaction binding

apps/gateway/src/plugin/plugin.module.ts

@@ -6,7 +6,7 @@ import {
   type OnModuleDestroy,
   type OnModuleInit,
 } from '@nestjs/common';
-import { DiscordPlugin } from '@mosaicstack/discord-plugin';
+import { DiscordPlugin, parseDiscordInteractionBindings } from '@mosaicstack/discord-plugin';
 import { TelegramPlugin } from '@mosaicstack/telegram-plugin';
 import { PluginService } from './plugin.service.js';
 import type { IChannelPlugin } from './plugin.interface.js';
@@ -85,6 +85,9 @@ function createPluginRegistry(): IChannelPlugin[] {
           allowedGuildIds: requiredDiscordAllowlist('DISCORD_ALLOWED_GUILD_IDS'),
           allowedChannelIds: requiredDiscordAllowlist('DISCORD_ALLOWED_CHANNEL_IDS'),
           allowedUserIds: requiredDiscordAllowlist('DISCORD_ALLOWED_USER_IDS'),
+          interactionBindings: parseDiscordInteractionBindings(
+            process.env['DISCORD_INTERACTION_BINDINGS'],
+          ),
         }),
       ),
     );