Add minimal requirements for podcast-only mode

backend/requirements-podcast.txt

@@ -0,0 +1,57 @@
+# Core dependencies
+fastapi>=0.115.14
+starlette>=0.40.0,<0.47.0
+sse-starlette<3.0.0
+uvicorn>=0.24.0
+uvicorn[standard]>=0.24.0
+gunicorn>=21.0.0
+
+# Server utilities
+python-multipart>=0.0.6
+python-dotenv>=1.0.0
+loguru>=0.7.2
+tenacity>=8.2.3
+pydantic>=2.5.2,<3.0.0
+typing-extensions>=4.8.0
+
+# Authentication
+PyJWT>=2.8.0
+cryptography>=41.0.0
+fastapi-clerk-auth>=0.0.7
+
+# Database
+sqlalchemy>=2.0.25
+
+# Payment
+stripe>=8.0.0
+
+# HTTP & API
+httpx>=0.27.2,<0.28.0
+
+# AI/ML (needed for podcast)
+openai>=1.3.0
+google-genai>=1.0.0
+
+# TTS for podcast
+gtts>=2.4.0
+pyttsx3>=2.90
+
+# Text processing
+markdown>=3.5.0
+
+# Data processing
+pandas>=2.0.0
+numpy>=1.24.0
+
+# Image/audio processing
+Pillow>=10.0.0
+huggingface_hub>=1.1.4
+
+# Video composition
+moviepy==2.1.2
+imageio>=2.31.0
+imageio-ffmpeg>=0.4.9
+
+# Testing
+pytest>=7.4.0
+pytest-asyncio>=0.21.0