fix(trading_engine): ignore Redis integration tests that need localhost:6379

Three Redis tests were running unconditionally on CI despite requiring
a local Redis server. They spin on connection attempts causing 60s+
timeouts and eventual test-gate failure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/trading_engine/src/persistence/redis_integration_test.rs

@@ -33,6 +33,7 @@ impl TestData {
 /// Test `Redis` connection pool with `HFT` optimizations
 /// Requires `Redis` server running on localhost:6379
 #[tokio::test]
+#[ignore = "Requires Redis on localhost:6379"]
 async fn test_redis_hft_performance() {
     // Skip test if Redis is not available (for CI/CD environments)
     let config = RedisConfig {
@@ -158,6 +159,7 @@ async fn test_redis_hft_performance() {
 /// Test `Redis` connection pool under load
 /// Requires `Redis` server running on localhost:6379
 #[tokio::test]
+#[ignore = "Requires Redis on localhost:6379"]
 async fn test_redis_concurrent_load() {
     let config = RedisConfig {
         max_connections: 60, // Increased to handle 50 concurrent tasks
@@ -244,6 +246,7 @@ async fn test_redis_concurrent_load() {
 /// Benchmark `Redis` connection manager vs direct connection performance
 /// Requires `Redis` server running on localhost:6379
 #[tokio::test]
+#[ignore = "Requires Redis on localhost:6379"]
 async fn test_redis_connection_manager_performance() {
     let config = RedisConfig {
         max_connections: 30, // Increased for test reliability