Add CryptoHFTData historical data provider

[hmate9]

Summary

Adds CryptoHFTData as a first-class historical market-data provider in PFeed.

• adds pe.CryptoHFTData() / pe.CHD() clients and DataSource.CRYPTO_HFT_DATA
• uses the official optional SDK via pfeed[cryptohftdata], including keyless free-tier access
• exposes exchange and symbol discovery
• downloads venue-specific historical trades as PFeed ticks
• resamples trades through PFeed's existing pipeline into second, minute, hour, and daily bars
• includes the upstream exchange in product identity and data_origin so venues never collide in storage
• supports CRYPTOHFTDATA_API_KEY, CRYPTO_HFT_DATA_API_KEY, and CHD_API_KEY
• adds focused tests, usage documentation, a runnable script, and a notebook

CryptoHFTData also provides order-book history. That is deliberately not exposed in this change because PFeed's quote/order-book validation and resampling path is currently marked unsupported; the integration should not imply semantic support that PFeed cannot yet preserve end to end.

Disclosure: I am the creator of CryptoHFTData.

Validation

• ruff check --config ./afterpython/ruff.toml .
• ruff format --check --config ./afterpython/ruff.toml .
• pytest tests/unit/crypto_hft_data tests/unit/test_etl.py tests/unit/test_resampling.py -q (5 passed)
• Pyright on the new provider modules and tests (0 errors)
• uv build
• keyless live download through the public PFeed API: KAVAUSDT on binance_futures, 2026-07-11; 15,699 trades were transformed into 1,214 one-minute bars covering 00:00 through 23:59

The repository's full legacy unit suite currently has unrelated collection failures from removed pfeed.data_tools modules and undeclared Dask dependencies. This change also updates the shared logging fixture to call the current configure_logging() API so maintained tests can initialize correctly.