libsql-sqlite3: Reset pager in sqlite3PagerWalEndCommit()

We need to reset the pager in sqlite3PagerWalEndCommit() to make sure
page cache is invalidated after injecting frames to WAL to ensure
they're visible.

Author: penberg

libsql-sqlite3/src/pager.c

@@ -7821,6 +7821,7 @@ int sqlite3PagerWalEndCommit(Pager *pPager) {
   if (rc != SQLITE_OK) {
     return rc;
   }
+  pager_reset(pPager);
   pager_unlock(pPager);
   return rc;
 }