Promote AgentCompany-New to the repository root and retire the old app

The legacy application - its src, tests, landing site, promo assets, docs,
release tooling, CI workflows, and root configs - leaves the tree; it stays
reachable in history. Everything under AgentCompany-New moves up unchanged:
same package name, so the production userData/database path is untouched,
and e2e/build scripts already resolved paths relative to the project. The
developer cred.txt stays gitignored at its new location. Full verify:ci
passes from the new root.

src/main/services/migration-cutover-journal-service.ts

@@ -0,0 +1,103 @@
+import type { DatabaseSync } from "node:sqlite";
+import { createId } from "../../shared/ids";
+
+const REPLAYABLE_ENTITY_TYPES = new Set([
+  "agent",
+  "approval",
+  "browser_action",
+  "chat_message",
+  "chat_space",
+  "file",
+  "scheduled_post",
+  "social_account",
+  "task",
+  "workspace",
+]);
+
+export interface CutoverDeltaEvent {
+  id: string;
+  entityType: string;
+  entityId: string;
+  actorType: string;
+  actorId: string | null;
+  action: string;
+  payload: Record<string, unknown>;
+  createdAt: string;
+}
+
+export interface RecordCutoverEventInput {
+  orgId: string;
+  migrationReportId: string;
+  rollbackSnapshotId: string | null;
+  eventType: string;
+  actorType: string;
+  actorId: string | null;
+  payload: Record<string, unknown>;
+  createdAt?: string;
+}
+
+export class MigrationCutoverJournalService {
+  constructor(private readonly db: DatabaseSync) {}
+
+  recordEvent(input: RecordCutoverEventInput): string {
+    const id = createId("mce");
+    this.db.prepare(`
+      insert into migration_cutover_events(
+        id, org_id, migration_report_id, rollback_snapshot_id, event_type,
+        actor_type, actor_id, payload_json, created_at
+      ) values (?, ?, ?, ?, ?, ?, ?, ?, ?)
+    `).run(
+      id,
+      input.orgId,
+      input.migrationReportId,
+      input.rollbackSnapshotId,
+      input.eventType,
+      input.actorType,
+      input.actorId,
+      JSON.stringify(input.payload),
+      input.createdAt ?? new Date().toISOString(),
+    );
+    return id;
+  }
+
+  queueReconciliation(input: {
+    orgId: string;
+    migrationReportId: string;
+    rollbackSnapshotId: string;
+    events: CutoverDeltaEvent[];
+    createdAt?: string;
+  }): number {
+    let queued = 0;
+    const createdAt = input.createdAt ?? new Date().toISOString();
+    const statement = this.db.prepare(`
+      insert or ignore into migration_reconciliation_items(
+        id, org_id, migration_report_id, rollback_snapshot_id, source_event_id,
+        target_type, target_id, reason, state, payload_json, created_at, resolved_at, resolved_by_employee_id
+      ) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, null, null)
+    `);
+    for (const event of input.events) {
+      if (!REPLAYABLE_ENTITY_TYPES.has(event.entityType)) continue;
+      const result = statement.run(
+        createId("mri"),
+        input.orgId,
+        input.migrationReportId,
+        input.rollbackSnapshotId,
+        event.id,
+        event.entityType,
+        event.entityId,
+        "manual_delta_replay",
+        "open",
+        JSON.stringify({
+          action: event.action,
+          actorType: event.actorType,
+          actorId: event.actorId,
+          payload: event.payload,
+          createdAt: event.createdAt,
+        }),
+        createdAt,
+      );
+      queued += Number(result.changes);
+    }
+    return queued;
+  }
+}