feat(http): add circuit breaker and response size limit to HTTP client

Cargo.toml

@@ -27,7 +27,7 @@ futures-util = "0.3"
 async-trait = "0.1"
 
 # HTTP & WebSocket
-reqwest = { version = "0.13", default-features = false, features = ["json", "rustls", "gzip"] }
+reqwest = { version = "0.13", default-features = false, features = ["json", "rustls", "gzip", "stream"] }
 tokio-tungstenite = { version = "0.28", default-features = false, features = ["rustls-tls-native-roots", "connect"] }
 
 # Serialization
@@ -72,7 +72,6 @@ parking_lot = "0.12"
 url = "2.5"
 urlencoding = "2.1"
 regex = "1.10"
-lazy_static = "1.4"
 bitflags = "2.9"
 
 # Security
@@ -140,7 +139,6 @@ once_cell = { workspace = true }
 parking_lot = { workspace = true }
 url = { workspace = true }
 regex = { workspace = true }
-lazy_static = { workspace = true }
 paste = { workspace = true }
 
 [[bin]]

ccxt-core/Cargo.toml

@@ -63,6 +63,7 @@ once_cell = { workspace = true }
 parking_lot = { workspace = true }
 url = { workspace = true }
 urlencoding = { workspace = true }
+regex = { workspace = true }
 
 # Security
 zeroize = { workspace = true }

ccxt-core/src/base_exchange/mod.rs

@@ -93,6 +93,8 @@ impl BaseExchange {
                     strategy_type: crate::retry_strategy::RetryStrategyType::Fixed,
                     ..crate::retry_strategy::RetryConfig::default()
                 }),
+            max_response_size: 10 * 1024 * 1024, // 10MB default
+            circuit_breaker: None,               // Disabled by default for backward compatibility
         };
 
         let mut http_client = HttpClient::new(http_config)?;