fix(ci): resolve TS build errors across all services

- recordings.routes.ts: cast req.params.id to string (express 5 typed params)
- recordings.service.ts: cast Record<string,unknown>[] via unknown first
- guilds.routes.ts: cast req.params.guildId to string (2 sites)
- transmitter.ts: capture pcmStream ref locally + re-acquire in drain callback

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

services/backend/src/modules/recordings/recordings.routes.ts

@@ -31,7 +31,7 @@ export function createRecordingsRouter(): Router {
   router.delete(
     "/recordings/:id",
     asyncHandler(async (req: Request, res: Response) => {
-      const { id } = req.params;
+      const id = req.params.id as string;
       await recordingsService.deleteById(id);
       res.json({ ok: true });
     }),

services/backend/src/modules/recordings/recordings.service.ts

@@ -68,7 +68,7 @@ export class RecordingsService {
       LIMIT ${limit + 1}
     `);
 
-    const items = rows.slice(0, limit) as RecordingRow[];
+    const items = rows.slice(0, limit) as unknown as RecordingRow[];
     const hasMore = rows.length > limit;
     const nextCursor = hasMore ? String(items[items.length - 1]!.created_at) : null;
 

services/backend/src/modules/voice/guilds.routes.ts

@@ -27,7 +27,7 @@ export function createGuildsRouter(): Router {
   router.get(
     "/:guildId/channels",
     asyncHandler(async (req: Request, res: Response) => {
-      const guildId = req.params.guildId;
+      const guildId = req.params.guildId as string;
       logger.debug({ guildId }, "Fetching text channels");
       const channels = await getTextChannels(guildId);
       res.json(channels);
@@ -38,7 +38,7 @@ export function createGuildsRouter(): Router {
   router.get(
     "/:guildId/voice-channels",
     asyncHandler(async (req: Request, res: Response) => {
-      const guildId = req.params.guildId;
+      const guildId = req.params.guildId as string;
       logger.debug({ guildId }, "Fetching voice channels");
       const channels = await getVoiceChannels(guildId);
       res.json(channels);