fix: add HuggingFace Spaces README config

- Add YAML frontmatter with sdk: docker
- Add API documentation

README.md

@@ -0,0 +1,42 @@
+---
+title: ForexDataLake
+emoji: 📈
+colorFrom: blue
+colorTo: green
+sdk: docker
+pinned: false
+---
+
+# ForexDataLake API
+
+High-performance market data API serving OHLCV data from a HuggingFace-hosted parquet data lake.
+
+## Features
+
+- **111 instruments** across forex, crypto, commodities, and stocks
+- **7 timeframes** from 1-minute to daily
+- **276M+ rows** of historical price data
+- Technical indicators (SMA, EMA, RSI, MACD, ATR, VWAP, BBands)
+- Equity curve and trade reports
+- WebSocket streaming
+- Zero local storage — reads directly from HuggingFace
+
+## Endpoints
+
+| Method | Path | Description |
+|--------|------|-------------|
+| GET | `/api/v1/health` | Health check |
+| GET | `/api/v1/symbols` | List all symbols |
+| GET | `/api/v1/symbols/search?q=EUR` | Search symbols |
+| GET | `/api/v1/symbols/{symbol}` | Symbol detail |
+| GET | `/api/v1/data?symbol=EURUSD&timeframe=1hr` | OHLCV data |
+| GET | `/api/v1/data/range` | Date range info |
+| GET | `/api/v1/data/latest` | Latest bars |
+| GET | `/api/v1/indicators/{symbol}` | Technical indicators |
+| GET | `/api/v1/reports/equity` | Equity curve |
+| GET | `/api/v1/reports/trades` | Trade records |
+| WS | `/api/v1/ws/stream` | WebSocket streaming |
+
+## Authentication
+
+All endpoints (except `/health`) require an API key via `X-API-Key` header.