feat: SDD workflow — test sync, song generation + validation, ReaScript hybrid pipeline

- compose-test-sync: fix 3 failing tests (NOTE_TO_MIDI, DrumLoopAnalyzer mock, section name)
- generate-song: CLI wrapper + RPP validator (6 structural checks) + 4 e2e tests
- reascript-hybrid: ReaScriptGenerator + command protocol + CLI + 16 unit tests
- 110/110 tests passing
- Full SDD cycle (propose→spec→design→tasks→apply→verify) for all 3 changes

tests/test_render_cli.py

@@ -43,19 +43,10 @@ class TestComposeNoRender:
 
     def test_main_without_render_produces_rpp(self, tmp_path):
         from unittest.mock import patch, MagicMock
-        from src.composer.drum_analyzer import DrumLoopAnalysis, Transient, BeatGrid
 
         output = tmp_path / "track.rpp"
-        fake_analysis = DrumLoopAnalysis(
-            file_path="f.wav", bpm=95.0, duration=8.0,
-            beats=[0.0, 0.6316, 1.2632, 1.8947],
-            transients=[Transient(time=0.0, type="kick", energy=0.8, spectral_centroid=100)],
-            beat_grid=BeatGrid(quarter=[0.0, 0.6316], eighth=[], sixteenth=[]),
-            key="Am", key_confidence=0.8, energy_profile=[0.5], bar_count=1,
-        )
 
-        with patch("scripts.compose.SampleSelector") as mock_cls, \
-             patch("scripts.compose.DrumLoopAnalyzer") as mock_a_cls:
+        with patch("scripts.compose.SampleSelector") as mock_cls:
             mock_sel = MagicMock()
             mock_sel._samples = [
                 {"role": "drumloop", "perceptual": {"tempo": 95.0}, "musical": {"key": "Am"},
@@ -65,9 +56,6 @@ class TestComposeNoRender:
             mock_sel.select.return_value = [MagicMock(sample={"original_path": "c.wav"})]
             mock_sel.select_diverse.return_value = [{"original_path": "v.wav", "file_hash": "v"}]
             mock_cls.return_value = mock_sel
-            mock_a = MagicMock()
-            mock_a.analyze.return_value = fake_analysis
-            mock_a_cls.return_value = mock_a
 
             from scripts.compose import main
             orig = sys.argv