feat: adapt T-HUB features — folders schema, Instagram connector, outreach contacts, media RLS force

From the hacklab/T-HUB fork (diverged at a6843e9):
- 046_file_folders: folder trees (group + personal scope, RLS forced,
  workspace-immutability trigger) + created_by on chat_media_archive
- Instagram connector wired into connect + publishing
- outreach contacts: per-collective DM tracking (todo/sent/replied/declined),
  RLS forced, role-scoped permissions, audit without message text,
  migration renumbered 041→047
- FORCE row-level security on media_assets
The J1 api agent's folder service/controller work continues separately.

apps/api/src/outreach/outreach.module.ts

@@ -0,0 +1,13 @@
+import { Module } from "@nestjs/common";
+import { OutreachController } from "./outreach.controller.js";
+import { OutreachService } from "./outreach.service.js";
+
+/**
+ * Outreach contacts: the list of public accounts a collective writes to by
+ * hand, with the drafted message and the sent/replied state per contact.
+ */
+@Module({
+  controllers: [OutreachController],
+  providers: [OutreachService],
+})
+export class OutreachModule {}