fix(gateway): enable stream for all LLM calls — router always streams SSE

Audit lanjutan: 6x 'LLM API request failed: Request was aborted' per jam.
Root cause: 9router/omniroute SELALU balas SSE (data: chunks) walau request
tanpa stream:true — SDK OpenAI non-stream menunggu FULL body sebelum parse,
jadi batch moderasi besar yang upstream-nya lambat kena timeout 30-60s dan
di-abort. llmClient sudah punya agregasi streaming (chunks → ChatCompletion).

Fix: stream:true di llmCaller (moderasi batch/individual), llmVision,
cultureLearner, userProfileLearner. Verified: SDK stream test 806ms vs
sebelumnya abort. Caller lain (recovery worker dll) lewat llmCaller sama.

services/discord-gateway/src/modules/ai-moderation/userProfileLearner.ts

@@ -116,6 +116,7 @@ atau konten SARA, itu akan SANGAT tidak sesuai dengan karakternya dan patut dicu
       max_tokens: 2000,
       temperature: 0.7, // Higher temp for summarization
       retries: 2,
+      stream: true, // router always streams SSE; non-stream waits for full body and times out
     });
 
     if (!completion) throw new Error("Empty response from LLM");