feat(infra): add tools service with document scanner, image & PDF tools

Implement self-hosted document scanner and media processing tools as
an alternative to CamScanner/ilovepdf without third-party uploads.

Backend: Rust Axum gateway + worker pool with NATS JetStream queue
Frontend: Next.js 16 + shadcn/ui + Tailwind v4 + Framer Motion
Pipeline: Canny edge detection -> DLT homography warp -> Sauvola
binarization -> Hough deskew -> Tesseract OCR -> searchable PDF

Phase 1 (MVP) delivers:
- Document scanner with perspective correction and OCR
- Image compress/resize/convert tools
- PDF merge/split/compress tools
- Real-time WebSocket progress updates
- Rate limiting, auto-cleanup, Prometheus metrics
- Full CI/CD pipeline with Docker multi-stage build

Co-Authored-By: Kilo <kilo@kilo.ai>

apps/tools/frontend/src/app/api/job/[id]/route.ts

@@ -0,0 +1,26 @@
+import { NextRequest, NextResponse } from "next/server";
+
+const RUST_GATEWAY = process.env.RUST_GATEWAY_URL || "http://localhost:3001";
+
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  const { id } = await params;
+  try {
+    const response = await fetch(`${RUST_GATEWAY}/api/job/${id}`);
+    const data = await response.json();
+
+    if (!response.ok) {
+      return NextResponse.json(data, { status: response.status });
+    }
+
+    return NextResponse.json(data);
+  } catch (error) {
+    console.error("Job status proxy error:", error);
+    return NextResponse.json(
+      { error: "Failed to fetch job status" },
+      { status: 500 },
+    );
+  }
+}