feat(config): add telemetry and metrics configuration options

- Introduce new environment variables for telemetry and Prometheus metrics in .env.example
- Create example configuration files for Prometheus and Grafana dashboards
- Update main application to utilize new configuration settings for Sentry, audio converter, and proxy
- Enhance channel services to support audio conversion API integration
- Implement middleware for metrics IP whitelisting and basic authentication in routes

src/api/integrations/channel/whatsapp/whatsapp.baileys.service.ts

@@ -62,6 +62,7 @@ import { ChannelStartupService } from '@api/services/channel.service';
 import { Events, MessageSubtype, TypeMediaMessage, wa } from '@api/types/wa.types';
 import { CacheEngine } from '@cache/cacheengine';
 import {
+  AudioConverter,
   CacheConf,
   Chatwoot,
   ConfigService,
@@ -2837,7 +2838,8 @@ export class BaileysStartupService extends ChannelStartupService {
   }
 
   public async processAudio(audio: string): Promise<Buffer> {
-    if (process.env.API_AUDIO_CONVERTER) {
+    const audioConverterConfig = this.configService.get<AudioConverter>('AUDIO_CONVERTER');
+    if (audioConverterConfig.API_URL) {
       this.logger.verbose('Using audio converter API');
       const formData = new FormData();
 
@@ -2847,8 +2849,8 @@ export class BaileysStartupService extends ChannelStartupService {
         formData.append('base64', audio);
       }
 
-      const { data } = await axios.post(process.env.API_AUDIO_CONVERTER, formData, {
-        headers: { ...formData.getHeaders(), apikey: process.env.API_AUDIO_CONVERTER_KEY },
+      const { data } = await axios.post(audioConverterConfig.API_URL, formData, {
+        headers: { ...formData.getHeaders(), apikey: audioConverterConfig.API_KEY },
       });
 
       if (!data.audio) {