v0.2.0 — CSV precision + CLI improvements + resilience

• Breaking-ish change: CSV numeric fields are now written as raw API strings (no float formatting like :.10f) to avoid precision loss for small-price assets.
• Add CLI arguments: --symbols-file, --sleep, --version.
• Add runtime progress bar dependency: tqdm.
• Improve robustness: retry with backoff and per-symbol error handling (no full-run crash on one symbol).
• Add unit tests and CI sanity-check (Python 3.9–3.12).

v0.1.0 — Binance Spot OHLCV CSV exporter (CLI)

• Exports Binance Spot OHLCV (klines) to CSV via CLI.
• Supports batch symbol input via --symbols-file.
• Downloads multiple timeframes in one run (e.g., 1h, 4h) with de-duplication by open time.
• Rate-limit friendly execution: configurable --sleep, retries/backoff handling (incl. 429).
• Generates summary_metrics.csv with 90d/180d price change and average daily volume per symbol.
• Includes run.sh (Linux/macOS) and run.ps1 (Windows) helpers for quick setup/run.