fix(ci): suppress prism-media type definition errors in build

Added @ts-expect-error comments to suppress 3 pre-existing TypeScript errors
in prism-media@1.3.5 type definitions that were breaking CI/CD builds:
- types.ts:59 - OggLogicalBitstream type not exported
- segment.ts:40 - OggLogicalBitstream property missing
- segment.ts:42 - OpusHead property missing

These errors are masked locally by skipLibCheck but fail in Docker builds.
Surgical fix: 3 comment lines added across 2 files.

Verified: tsc --noEmit now passes with 0 errors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/discord-gateway/src/modules/message-capture/types.ts

@@ -56,6 +56,7 @@ export interface SegmentState {
   endTime: number | null;
   filename: string;
   jsonFilename: string;
+  // @ts-expect-error - prism-media@1.3.5 type definitions incomplete
   oggStream: prism.opus.OggLogicalBitstream;
   out: fs.WriteStream;
 }

services/discord-gateway/src/modules/voice-recording/recorder/segment.ts

@@ -37,7 +37,9 @@ export class SegmentManager {
       this.userDir,
       startTime,
     );
+    // @ts-expect-error - prism-media@1.3.5 type definitions incomplete
     const oggStream = new prism.opus.OggLogicalBitstream({
+      // @ts-expect-error - prism-media@1.3.5 type definitions incomplete
       opusHead: new prism.opus.OpusHead({ channelCount: 2, sampleRate: 48000 }),
       pageSizeControl: { maxPackets: 10 },
       crc: true,