feat: expand admin and data sync workflows

apps/api/src/users/users.service.ts

@@ -111,6 +111,30 @@ export class UsersService {
     });
   }
 
+  /**
+   * Hard-delete a user. The schema's ActivityLog.userId FK would otherwise
+   * block the row (default `Restrict`), so null it out in the same
+   * transaction. Rows + the actor id captured in the `message` JSON stay
+   * intact for the audit trail.
+   */
+  async remove(id: string, actingUserId: string): Promise<void> {
+    if (id === actingUserId) {
+      throw new BadRequestException("No puede eliminar su propia cuenta");
+    }
+    await this.ensureExists(id);
+    try {
+      await this.prisma.$transaction([
+        this.prisma.activityLog.updateMany({
+          where: { userId: id },
+          data: { userId: null },
+        }),
+        this.prisma.user.delete({ where: { id } }),
+      ]);
+    } catch (e) {
+      throw this.mapError(e);
+    }
+  }
+
   private async ensureExists(id: string): Promise<void> {
     const found = await this.prisma.user.findUnique({ where: { id }, select: { id: true } });
     if (!found) throw new NotFoundException(`Usuario ${id} no encontrado`);