feat: Drama Studio 프로젝트 초기 구조 설정

- FastAPI 백엔드 (audio-studio-api)
- Next.js 프론트엔드 (audio-studio-ui)
- Qwen3-TTS 엔진 (audio-studio-tts)
- MusicGen 서비스 (audio-studio-musicgen)
- Docker Compose 개발/운영 환경

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

audio-studio-api/requirements.txt

@@ -0,0 +1,31 @@
+# Audio Studio API Server - Dependencies
+
+# FastAPI
+fastapi==0.115.6
+uvicorn[standard]==0.34.0
+python-multipart==0.0.20
+
+# Database
+motor==3.7.0
+pymongo==4.10.1
+redis==5.2.1
+
+# Pydantic
+pydantic==2.10.4
+pydantic-settings==2.7.1
+
+# HTTP Client
+httpx==0.28.1
+aiofiles==24.1.0
+
+# Audio Processing
+soundfile>=0.12.1
+numpy>=1.26.0
+pydub>=0.25.1
+
+# Freesound API (httpx로 직접 구현)
+
+# Utilities
+python-dotenv==1.0.1
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4