readonly sessions on mongo (+checks on BE)

packages/types/engines.d.ts

@@ -47,6 +47,7 @@ export interface EngineDriver {
   title: string;
   defaultPort?: number;
   databaseEngineTypes: string[];
+  readOnlySessions: boolean,
   supportedKeyTypes: { name: string; label: string }[];
   supportsDatabaseUrl?: boolean;
   isElectronOnly?: boolean;