Toggle between db in renderer and in main

ts/sql/Interface.ts

@@ -398,6 +398,12 @@ export type ClientInterface = DataInterface & {
   // Client-side only, and test-only
 
   _removeConversations: (ids: Array<string>) => Promise<void>;
+  _jobs: { [id: string]: ClientJobType };
+
+  // These are defined on the server-only and used in the client to determine
+  // whether we should use IPC to use the database in the main process or
+  // use the db already running in the renderer.
+  goBackToMainProcess: () => void;
 };
 
 export type ClientJobType = {

ts/sql/initialize.ts

@@ -14,3 +14,7 @@ export async function initialize(): Promise<void> {
 
   await sql.initializeRenderer({ configDir, key });
 }
+
+export function goBackToMainProcess(): void {
+  window.Signal.Data.goBackToMainProcess();
+}