feat: Implement senior audio injection with 5 fallback methods

- Add _cmd_create_arrangement_audio_pattern with 5-method fallback chain
- Method 1: track.insert_arrangement_clip() [Live 12+]
- Method 2: track.create_audio_clip() [Live 11+]
- Method 3: arrangement_clips.add_new_clip() [Live 12+]
- Method 4: Session->duplicate_clip_to_arrangement [Legacy]
- Method 5: Session->Recording [Universal]

- Add _cmd_duplicate_clip_to_arrangement for session-to-arrangement workflow
- Update skills documentation
- Verified: 3 clips created at positions [0, 4, 8] in Arrangement View

Closes: Audio injection in Arrangement View

presets/perreo_Am_95bpm_1776010664.json

@@ -0,0 +1,38 @@
+{
+  "name": "perreo_Am_95bpm_1776010664",
+  "description": "reggaeton perreo 95bpm Am",
+  "parameters": {
+    "bpm": 95,
+    "key": "Am",
+    "genre": "reggaeton",
+    "style": "perreo",
+    "intensity": "medium",
+    "original_description": "reggaeton perreo 95bpm Am"
+  },
+  "samples": {
+    "kick": "kick 1.wav",
+    "snare": "snare 1.wav",
+    "hihat": "hi-hat 1.wav",
+    "bass": "reese bass 1.wav"
+  },
+  "structure": [
+    {
+      "name": "Hook",
+      "type": "chorus",
+      "bars": 8
+    },
+    {
+      "name": "Drop",
+      "type": "drop",
+      "bars": 8
+    },
+    {
+      "name": "Out",
+      "type": "outro",
+      "bars": 4
+    }
+  ],
+  "coherence": 0.85,
+  "mix_applied": false,
+  "created_at": "2026-04-12 13:17:44"
+}