CTraderConnection establishes TCP+TLS via tokio-native-tls, wraps in
framed codec, splits into shared sender + exclusive receiver, and
spawns a heartbeat task at configurable interval (default 10s).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
New workspace crate for cTrader Open API client (Protobuf over TCP+TLS).
Includes CTraderConfig, CTraderEnvironment, CTraderError, and RateLimitBucket types.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>