Merge pull request #377 from crescentrose/add-missing-index-unused-variant

Fix job statistics deserialization for cached queries

Author: yoshidan

bigquery/src/http/job/mod.rs

@@ -839,6 +839,8 @@ pub enum IndexUnusedCode {
     BaseTableTooSmall,
     BaseTableTooLarge,
     EstimatedPerformanceGainTooLow,
+    QueryCacheHit,
+    StaleIndex,
     InternalError,
     OtherReason,
 }