[core] recreate offline database when it is deleted out from under our feet

platform/default/sqlite3.cpp

@@ -45,6 +45,10 @@ public:
     DatabaseImpl(sqlite3* db_)
         : db(db_)
     {
+        const int error = sqlite3_extended_result_codes(db, true);
+        if (error != SQLITE_OK) {
+            mbgl::Log::Warning(mbgl::Event::Database, error, "Failed to enable extended result codes: %s", sqlite3_errmsg(db));
+        }
     }
 
     ~DatabaseImpl()