Add radio show audio processor and post-show workflow

- Audio processor CLI tool with 6-stage pipeline: transcribe (faster-whisper GPU),
  diarize (pyannote), detect segments (multi-signal classifier), remove commercials,
  split segments, analyze content (Ollama)
- Post-show workflow doc for episode posts, forum threads, deep-dive blog posts
- Training plan for using 579-episode archive for voice profiles and commercial detection
- Successful test: 45min episode transcribed in 2:37 on RTX 5070 Ti
- Sample transcript output from S7E30 (March 2015)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -63,3 +63,7 @@ api/.env
 .mcp.json
 Pictures/
 .grepai/
+# Radio processor
+projects/radio-show/audio-processor/test-data/*.mp3
+projects/radio-show/audio-processor/*.egg-info/
+