chore: add missing migrations and routes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/backoffice/app/api/libraries/[id]/reading-status-provider/route.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+import { apiFetch } from "@/lib/api";
+
+export async function PATCH(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params;
+  try {
+    const body = await request.json();
+    const data = await apiFetch(`/libraries/${id}/reading-status-provider`, {
+      method: "PATCH",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(body),
+    });
+    return NextResponse.json(data);
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "Failed to update reading status provider";
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+}