Add Binance L2 capture tooling

[tradingexpert]

Summary

• add an optional Binance USD-M capture command without changing core dependencies
• record 100 ms diff depth, aggregate trades, real-time book ticker, REST snapshots, and optional RPI depth
• preserve raw payloads with UTC and monotonic receive times, connection IDs, hourly gzip rotation, and run manifests
• detect pu/u depth-sequence gaps within each connection
• document that capture is evidence acquisition, not observed MBO or an L2-to-L3 claim

Boundary

This PR does not produce virtual L3 events yet. It establishes the raw, auditable input needed by the later BinanceL2Source and named reconstruction model.

Verification

• ruff passes
• 172 pytest tests pass
• all new Binance modules are at 100% coverage; total coverage is 98.56%
• source distribution and wheel build successfully; twine metadata checks pass
• clean-wheel import and CLI help smoke tests pass
• live BTCUSDT/ETHUSDT smoke capture produced two 1,000-level snapshots and 1,417 messages across depth, aggregate-trade, book-ticker, and RPI streams with zero sequence gaps