feat: initial HSAP platform

Huaxu Sentinel Active Safety Platform with embedded algorithm code,
Docker Compose setup, and vendored dataset scaffolds for clone-and-run.

Co-authored-by: Cursor <cursoragent@cursor.com>

requirements.txt

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+# 华胥主动安全平台 — Python 依赖
+fastapi>=0.100.0
+uvicorn>=0.23.0
+pyyaml>=6.0
+sqlalchemy>=2.0.0
+psycopg2-binary>=2.9.9
+redis>=5.0.0
+python-jose[cryptography]>=3.3.0
+httpx>=0.27.0
+Pillow>=10.0.0
+python-multipart>=0.0.9