fix(goLive): retry VIDEO(op12)/SPEAKING(op5) opcodes until ws OPEN — broken shared-screen video

Root cause: BaseMediaConnection.sendOpcode is a silent no-op when
ws.readyState !== OPEN. In GoLive, playStream() calls setVideoAttributes(true)
+ setSpeaking(true) the instant createStream() resolves (right after
SELECT_PROTOCOL_ACK), but the StreamConnection WebSocket can still be in
CONNECTING for a few ms — so op 12 (VIDEO, activating the video SSRC) was
silently DROPPED every session. Empirically verified: 0 ops 12/5 ever logged
across the entire journal, yet 10k+ video frames were sent and audio played
(audio SSRC is activated via the VoiceConnection handshake, independent of
GoLive op 12). Discord's media server thus received video RTP on video_ssrc
but was never told to forward it → black/broken shared-screen video with
working voice.

sendOpcodeWhenOpen retries up to ~2s for ws OPEN instead of dropping. Also
emits a=fmtp:101 packetization-mode=1;profile-level-id=42e01f in the answer
SDP (H264 FU-A fragments require packetization-mode=1 to reassemble).

Also removes pre-existing noNonNullAssertion lint (biome 2.5.8 now errors)
that was blocking the deploy CI.

services/backend/src/modules/messages/messages.repository.ts

@@ -77,12 +77,11 @@ export class MessagesRepository {
 
     // Exclude spam threads (NULL-safe: non-thread messages are kept)
     if (EXCLUDED_THREAD_IDS.length > 0) {
-      conditions.push(
-        or(
-          isNull(pgMessagesTable.thread_id),
-          notInArray(pgMessagesTable.thread_id, EXCLUDED_THREAD_IDS),
-        )!,
+      const excludeThreads = or(
+        isNull(pgMessagesTable.thread_id),
+        notInArray(pgMessagesTable.thread_id, EXCLUDED_THREAD_IDS),
       );
+      if (excludeThreads) conditions.push(excludeThreads);
     }
 
     const where = conditions.length > 0 ? and(...conditions) : undefined;
@@ -150,12 +149,11 @@ export class MessagesRepository {
 
     // Exclude spam threads (NULL-safe)
     if (EXCLUDED_THREAD_IDS.length > 0) {
-      conditions.push(
-        or(
-          isNull(pgMessagesTable.thread_id),
-          notInArray(pgMessagesTable.thread_id, EXCLUDED_THREAD_IDS),
-        )!,
+      const excludeThreads = or(
+        isNull(pgMessagesTable.thread_id),
+        notInArray(pgMessagesTable.thread_id, EXCLUDED_THREAD_IDS),
       );
+      if (excludeThreads) conditions.push(excludeThreads);
     }
 
     const rows = await db
@@ -316,12 +314,13 @@ export class MessagesRepository {
           like(pgAttachmentsTable.type, "image/%"),
           // Exclude spam threads (NULL-safe for non-thread messages)
           ...(EXCLUDED_THREAD_IDS.length > 0
-            ? [
-                or(
+            ? (() => {
+                const excludeThreads = or(
                   isNull(pgAttachmentsTable.thread_id),
                   notInArray(pgAttachmentsTable.thread_id, EXCLUDED_THREAD_IDS),
-                )!,
-              ]
+                );
+                return excludeThreads ? [excludeThreads] : [];
+              })()
             : []),
         ),
       )