fix token consumption so we dont get random data at the end

dynamodb/expression.odin

@@ -203,6 +203,16 @@ parse_key_condition_expression :: proc(
 		sk_condition = skc
 	}
 
+	// Verify all tokens were consumed (no trailing garbage)
+	if trailing := tokenizer_next(&t); trailing != nil {
+		delete(pk_name)
+		attr_value_destroy(&pk_value)
+		if skc, has_skc := sk_condition.?; has_skc {
+			skc_copy := skc
+			sort_key_condition_destroy(&skc_copy)
+		}
+		return
+	}
 
 	kc = Key_Condition{
 		pk_name      = pk_name,

dynamodb/filter.odin

@@ -184,7 +184,17 @@ parse_filter_expression :: proc(
 ) -> (node: ^Filter_Node, ok: bool) {
 	t := tokenizer_init(expression)
 	node, ok = parse_or_expr(&t, attribute_names, attribute_values)
-	return
+	if !ok {
+		return nil, false
+	}
+
+	// Verify all tokens were consumed (no trailing garbage)
+	if trailing := tokenizer_next(&t); trailing != nil {
+		filter_node_destroy(node)
+		return nil, false
+	}
+
+	return node, true
 }
 
 parse_or_expr :: proc(