fix cloned string cleanup

dynamodb/condition.odin

@@ -16,6 +16,7 @@
 package dynamodb
 
 import "core:encoding/json"
+import "core:strings"
 
 // ============================================================================
 // Condition Evaluation Result
@@ -54,7 +55,7 @@ parse_condition_expression_string :: proc(request_body: []byte) -> (expr: string
 		return
 	}
 
-	expr = string(ce_str)
+	expr = strings.clone(string(ce_str))
 	ok = true
 	return
 }
@@ -88,6 +89,7 @@ evaluate_condition_expression :: proc(
 	if !has_condition {
 		return .Passed // No condition → always pass
 	}
+	defer delete(condition_str)
 
 	// Parse the condition into a filter tree (same grammar as FilterExpression)
 	filter_node, parse_ok := parse_filter_expression(condition_str, attr_names, attr_values)