ems-core v1.0.0: Standard EMS platform core

Shared backend + frontend for multi-customer EMS deployments.
- 12 enterprise modules: quota, cost, charging, maintenance, analysis, etc.
- 120+ API endpoints, 37 database tables
- Customer config mechanism (CUSTOMER env var + YAML config)
- Collectors: Modbus TCP, MQTT, HTTP API, Sungrow iSolarCloud
- Frontend: React 19 + Ant Design + ECharts + Three.js
- Infrastructure: Redis cache, rate limiting, aggregation engine

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/requirements.txt

@@ -0,0 +1,26 @@
+fastapi==0.115.6
+uvicorn[standard]==0.34.0
+sqlalchemy[asyncio]==2.0.36
+asyncpg==0.30.0
+psycopg2-binary==2.9.10
+alembic==1.14.0
+pydantic==2.10.3
+pydantic-settings==2.7.0
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+python-multipart==0.0.18
+redis[hiredis]==5.2.1
+celery==5.4.0
+httpx==0.28.1
+pandas==2.2.3
+openpyxl==3.1.5
+reportlab==4.2.5
+apscheduler==3.10.4
+gunicorn==23.0.0
+pymodbus>=3.6.0
+aiomqtt>=2.0.0
+pytest==8.3.4
+pytest-asyncio==0.25.0
+pytest-cov==6.0.0
+aiosqlite==0.20.0
+pyyaml>=6.0