fix: CI biome errors + enhanced GUILD_CREATE/READY voice_states diagnostic

- live-speaker.ts: unused var [id] in clearAllSpeakers → [_]
- migrate.ts: useTemplate string concat → template literal
- streamWatchReceiver: remove unused watchKey param from closeCurrentSegment
- videoRecorder: log all raw WS event types + READY sessions.voice + broadcaster_user_ids

services/backend/src/modules/voice/live-speaker.ts

@@ -99,7 +99,7 @@ export function getSpeakingSpeakers(): LiveSpeaker[] {
  * snapshot doesn't carry ghost speakers.
  */
 export function clearAllSpeakers(): void {
-  for (const [id, s] of speakers) {
+  for (const [, s] of speakers) {
     s.speaking = false;
   }
   purgeStale();

services/discord-gateway/src/modules/voice-recording/streamWatchReceiver.ts

@@ -122,7 +122,7 @@ const _silenceInterval = setInterval(() => {
     );
 
     // Fire-and-forget: close + finalize the segment.
-    void closeCurrentSegment(watch, watchKey);
+    void closeCurrentSegment(watch);
   }
 }, 2_000);
 // Prevent the interval from keeping the process alive.
@@ -655,10 +655,7 @@ async function openOutput(
  * ready for a new segment (silence ended → packets resume).
  * Mirrors voice recording's finalizeSegment + uploadRecordingSegment flow.
  */
-async function closeCurrentSegment(
-  watch: WatchState,
-  watchKey: string,
-): Promise<void> {
+async function closeCurrentSegment(watch: WatchState): Promise<void> {
   if (!watch.out || watch.out.destroyed || watch.closing) return;
   // Mark closing FIRST (synchronously) so the UDP handler stops writing.
   watch.closing = true;
@@ -835,7 +832,7 @@ function closeWatch(watch: WatchState): void {
   }
   // Finalize any open segment (mux to MP4 + DB + upload).
   if (watch.out && !watch.out.destroyed) {
-    void closeCurrentSegment(watch, `${watch.guildId}:${watch.uid}`);
+    void closeCurrentSegment(watch);
   }
 }
 

services/discord-gateway/src/modules/voice-recording/videoRecorder.ts

@@ -140,7 +140,12 @@ export function setVideoRecorderClient(client: Client | undefined) {
             : -1,
           broadcasterUserIds: dAny.broadcaster_user_ids,
           sessionVoice: Array.isArray(dAny.sessions)
-            ? (dAny.sessions as Array<{ voice?: unknown; session_id?: unknown }>)
+            ? (
+                dAny.sessions as Array<{
+                  voice?: unknown;
+                  session_id?: unknown;
+                }>
+              )
                 .map((s) => s.voice)
                 .filter(Boolean)
                 .slice(0, 5)

services/discord-gateway/src/shared/database/migrate.ts

@@ -194,8 +194,7 @@ async function seedDrizzleHistory(client: PoolClient): Promise<void> {
   // recorded). Seed up to the last journal `when` so Drizzle skips them
   // instead of re-running already-applied DDL and crashing. This is the
   // recovery that broke the gateway's infinite-restart loop.
-  const journalTag =
-    (await getFirstMigrationTag()) + `@${lastMigrationWhen}-reconciled`;
+  const journalTag = `${await getFirstMigrationTag()}@${lastMigrationWhen}-reconciled`;
   await client.query(
     `INSERT INTO "__drizzle_migrations" (hash, created_at) VALUES ($1, $2)`,
     [journalTag, lastMigrationWhen],