feat(backend): add SIMPLE_STREAMING WebRTC control-path streaming

Backend/media/config.ts

@@ -25,10 +25,29 @@ const parsePositiveNumber = (value: string | undefined): number | null => {
   return parsed;
 };
 
+export const parseFeatureFlag = (value: string | undefined, defaultValue: boolean): boolean => {
+  if (value === undefined) {
+    return defaultValue;
+  }
+
+  const normalized = value.trim().toLowerCase();
+  if (['1', 'true', 'yes', 'on'].includes(normalized)) {
+    return true;
+  }
+  if (['0', 'false', 'no', 'off'].includes(normalized)) {
+    return false;
+  }
+  return defaultValue;
+};
+
 export const mediaMode: MediaMode = parseMediaMode(process.env.MEDIA_MODE);
+export const simpleStreamingEnabled = parseFeatureFlag(process.env.SIMPLE_STREAMING, false);
+export const streamRecordingEnabled = parseFeatureFlag(process.env.STREAM_RECORDINGS_ENABLED, false);
 
 export const mediaConfig = {
   mode: mediaMode,
+  simpleStreamingEnabled,
+  streamRecordingEnabled,
   turn: {
     urls: parseCsv(process.env.TURN_URLS),
     username: process.env.TURN_USERNAME ?? '',
@@ -40,4 +59,3 @@ export const mediaConfig = {
     maxSubscribersPerRoom: parsePositiveNumber(process.env.MEDIA_MAX_SUBSCRIBERS_PER_ROOM),
   },
 };
-