bountx / LOB / 22766059408

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Implement Binance exchange adapter and Prometheus metrics integration (#21)

* Implement Binance exchange adapter and Prometheus metrics integration

- Added BinanceAdapter class for handling WebSocket connections and snapshot logic.
- Introduced IExchangeAdapter interface for exchange feed adapters.
- Created utility functions for symbol extraction and Prometheus metrics formatting.
- Updated main application logic to utilize the new BinanceAdapter.
- Added unit tests for streamToSymbol function and Prometheus output generation.

* Refactor Prometheus output to collect order book spread prices in a separate vector before writing

* Enhance BinanceAdapter and Prometheus integration with improved error handling and label escaping

* 📝 Add docstrings to `feat/iexchange-adapter-interface`

Docstrings generation was requested by @bountx.

The following files were modified:

* `src/binance_utils.hpp`
* `src/feed_handler.cpp`
* `src/feed_handler.hpp`
* `src/i_exchange_adapter.hpp`
* `src/main.cpp`
* `src/metrics_server.hpp`
* `src/prometheus_format.hpp`
* `tests/test_prometheus_format.cpp`

These files were kept as they were:
* `tests/test_binance_utils.cpp`

These file types are not supported:
* `CMakeLists.txt`
* `grafana/dashboards/lob.json`

* Enhance BinanceAdapter with interruptible snapshot fetching and graceful shutdown support

* pre-commit

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Co-authored-by: Andrzej Pijanowski <apijanowski@cloudferro.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

70 of 75 new or added lines in 2 files covered. (93.33%)

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