Fix build

backend/requirements-minimal.txt

@@ -0,0 +1,31 @@
+# Minimal requirements (without Essentia for faster build)
+
+# Web Framework
+fastapi==0.109.0
+uvicorn[standard]==0.27.0
+python-multipart==0.0.6
+
+# Database
+sqlalchemy==2.0.25
+psycopg2-binary==2.9.9
+pgvector==0.2.4
+alembic==1.13.1
+
+# Audio Processing (without Essentia)
+librosa==0.10.1
+soundfile==0.12.1
+audioread==3.0.1
+mutagen==1.47.0
+
+# Scientific Computing
+numpy==1.24.3
+scipy==1.11.4
+
+# Configuration & Validation
+pydantic==2.5.3
+pydantic-settings==2.1.0
+python-dotenv==1.0.0
+
+# Utilities
+aiofiles==23.2.1
+httpx==0.26.0