Hummingbot v2.15.0 Released

Hummingbot v2.15.0 has been officially released. The default rate oracle source has been switched from binance to gate_io, a new Lighter connector has been added, and the functionality and stability of connectors for multiple exchanges including Hyperliquid, BingX, and Binance have been optimized. This version update includes 28 feature improvements and bug fixes, and also welcomes 3 first-time contributors.