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>

output.py

@@ -152,6 +152,7 @@ def write_meeting_docs(
     dt: "datetime | None" = None,
     title: str = "",
     tldr: str = "",
+    transcript_text: str = "",
 ) -> dict[str, str]:
     """Write index (in output_dir), transkript + zusammenfassung (in subdir)."""
     if dt is None:
@@ -172,10 +173,13 @@ def write_meeting_docs(
     os.makedirs(subdir, exist_ok=True)
 
     # --- transkript (in subdir) ---
-    transcript_lines = []
-    for speaker, text in aligned_segments:
-        transcript_lines.append(f"**{speaker}:** {text}\n")
-    transcript_content = "\n".join(transcript_lines)
+    if transcript_text:
+        transcript_content = transcript_text
+    else:
+        transcript_lines = []
+        for speaker, text in aligned_segments:
+            transcript_lines.append(f"**{speaker}:** {text}\n")
+        transcript_content = "\n".join(transcript_lines)
     transkript_filename = f"{base}-transkript.md"
     transkript_path = os.path.join(subdir, transkript_filename)
     with open(transkript_path, "w", encoding="utf-8") as f: