refactor: clean upload pipeline and restore draco delivery

Dockerfile

@@ -1,6 +1,6 @@
 # =============================================================================
 # Upload GLTF — Dockerfile for Coolify
-# Node 20 Debian · Multi-stage build
+# Node 20 Debian · Blender (headless) · Multi-stage build
 # =============================================================================
 
 # --- Stage 1: Dependencies ---------------------------------------------------
@@ -28,10 +28,11 @@ RUN npm run build
 FROM node:20-slim AS runner
 
 LABEL maintainer="La Fabrik Durable"
-LABEL description="Secure GLTF upload interface with texture compression and GitHub push"
+LABEL description="Secure GLTF upload interface with Draco compression and GitHub push"
 
-# Install runtime helpers
+# Install Blender (headless) + runtime helpers
 RUN apt-get update && apt-get install -y --no-install-recommends \
+    blender \
     tini \
     curl \
     && rm -rf /var/lib/apt/lists/*
@@ -48,6 +49,9 @@ COPY --from=builder /app/.next/standalone ./
 COPY --from=builder /app/.next/static ./.next/static
 COPY --from=builder /app/public ./public
 
+# Copy the Blender compression script
+COPY --from=builder /app/scripts ./scripts
+
 # Ensure tmp dir for uploads exists
 RUN mkdir -p /tmp/assets