fix: 兼容 MySQL 代理 packet out of order

Co-authored-by: zipg <4047349+zipg@users.noreply.github.com>

crates/dbx-core/src/db/mysql.rs

@@ -1068,6 +1068,9 @@ fn mysql_error_should_retry_without_ssl(error: &str) -> bool {
         || error.contains("handshake")
         || error.contains("tls connection")
         || error.contains("server closed session")
+        // Some older MySQL proxies report a failed preferred-TLS probe as a
+        // protocol packet error instead of a TLS handshake error.
+        || error.contains("packet out of order")
         // Some MySQL-compatible servers report a preferred-TLS attempt as a
         // normal server error instead of a TLS handshake error.
         || (error.contains("client asked for ssl") && error.contains("server does not have this capability"))
@@ -4206,6 +4209,13 @@ UNIQUE KEY(`tenant_id`, `name``part`)
         assert!(mysql_error_should_retry_without_ssl(error));
     }
 
+    #[test]
+    fn mysql_packet_out_of_order_can_retry_without_ssl() {
+        let error = "MySQL connection failed: Input/output error: Input/output error: packet out of order";
+
+        assert!(mysql_error_should_retry_without_ssl(error));
+    }
+
     #[test]
     fn mysql_tcp_keepalive_uses_milliseconds_not_seconds() {
         assert_eq!(MYSQL_TCP_KEEPALIVE_MS, 30_000);