fix: whisper repetition loops, meeting transcript punctuation

- transcription: add temperature_inc=0 to whispercpp to disable fallback (prevents loops)
- pipeline: punctuate meeting transcript in one pass (parallel with summarize)
- output: write_meeting_docs accepts pre-built transcript_text
- llm: punctuate prompt preserves speaker labels

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/pipeline.py

@@ -144,8 +144,11 @@ async def _run_meeting_pipeline(cfg, wav_path, output_dir, instructions, diar_cf
     total_secs = sum(s["end"] - s["start"] for s in whisper_segs) if whisper_segs else 0
     duration_min = max(1, round(total_secs / 60))
 
-    transcript_text = "\n\n".join(f"**{spk}:** {txt}" for spk, txt in named_aligned)
-    summary = await client.summarize(transcript_text, model=cfg["ollama"]["model"])
+    raw_transcript = "\n\n".join(f"**{spk}:** {txt}" for spk, txt in named_aligned)
+    summary, punctuated_transcript = await asyncio.gather(
+        client.summarize(raw_transcript, model=cfg["ollama"]["model"]),
+        client.punctuate(raw_transcript, model=cfg["ollama"]["model"]),
+    )
     title, tldr = await client.generate_title_and_tldr(summary, model=cfg["ollama"]["model"])
 
     dt = datetime.now()
@@ -158,6 +161,7 @@ async def _run_meeting_pipeline(cfg, wav_path, output_dir, instructions, diar_cf
         dt=dt,
         title=title,
         tldr=tldr,
+        transcript_text=punctuated_transcript,
     )
 
     await state.set_status(Status.IDLE)