refactor(cnn): rename cnn_effect to cnn_v1_effect for clarity

Renamed files and classes:
- cnn_effect.{h,cc} → cnn_v1_effect.{h,cc}
- CNNEffect → CNNv1Effect
- CNNEffectParams → CNNv1EffectParams
- CNNLayerParams → CNNv1LayerParams
- CNN_EFFECT.md → CNN_V1_EFFECT.md

Updated all references:
- C++ includes and class usage
- CMake source list
- Timeline (workspaces/main/timeline.seq)
- Test file (test_demo_effects.cc)
- Documentation (CLAUDE.md, PROJECT_CONTEXT.md, READMEs)

Tests: 34/34 passing (100%)

1 files changed, 1 insertions, 1 deletions

diff --git a/CLAUDE.md b/CLAUDE.md
index 2a60521..526e940 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -12,7 +12,7 @@
 # TIER 3: DESIGN DOCS (Load On-Demand by Subsystem)
 #
 # Audio: SPECTRAL_BRUSH_EDITOR.md, TRACKER.md, BEAT_TIMING.md
-# CNN: CNN.md, CNN_EFFECT.md, CNN_V2*.md, CNN_TEST_TOOL.md, CNN_*ANALYSIS.md, CNN_BIAS_FIX*.md
+# CNN: cnn_v1/docs/CNN_V1_EFFECT.md, cnn_v2/docs/CNN_V2*.md
 # 3D/Graphics: 3D.md, GPU_PROCEDURAL_PHASE4.md, MASKING_SYSTEM.md, SDF_EFFECT_GUIDE.md
 # Scene: SCENE_FORMAT.md, SEQUENCE.md, WORKSPACE_SYSTEM.md
 # Build: ASSET_SYSTEM.md, BUILD.md, CMAKE_MODULES.md, SIZE_MEASUREMENT.md