Merge pull request #3374 from cloudflare/kenton/explicit-txn-unwind

Don't rollback ExplicitTxn if broken.

Author: kentonv

src/workerd/io/actor-sqlite.c++

@@ -128,7 +128,7 @@ ActorSqlite::ExplicitTxn::~ExplicitTxn() noexcept(false) {
     }
   }();
 
-  if (!committed) {
+  if (!committed && actorSqlite.broken == kj::none) {
     // Assume rollback if not committed.
     rollbackImpl();
   }