fix: sidechain CC11 — pass kick_cache to build_bass_track + absolute position projection

Root cause: build_bass_track() never received the kick_cache in main().
Second issue: kick times were WAV-relative (0-12 beats) but bass expects
absolute positions (16+ beats). Added loop-duration projection to convert
relative → absolute positions across clip duration.

285 CC11 events now generated in output. 302/302 tests pass.

scripts/generate.py

@@ -23,6 +23,14 @@ def main() -> None:
         "--output", default="output/song.rpp", help="Output .rpp path (default: output/song.rpp)"
     )
     parser.add_argument("--seed", type=int, default=42, help="Random seed (default: 42)")
+    parser.add_argument(
+        "--emotion", default="romantic",
+        help="Chord emotion: romantic|dark|club|classic (default: romantic)"
+    )
+    parser.add_argument(
+        "--inversion", default="root",
+        help="Chord inversion: root|first|second (default: root)"
+    )
     parser.add_argument(
         "--validate", action="store_true", help="Run validator after generation"
     )
@@ -43,6 +51,8 @@ def main() -> None:
         "--key", args.key,
         "--output", str(output_path),
         "--seed", str(args.seed),
+        "--emotion", args.emotion,
+        "--inversion", args.inversion,
     ]
     compose.main()