refactor: flatten monorepo structure to backend/ frontend/ devops/

Rename subdirectories for a cleaner single-repo layout:
- website-monitoring-backend/  → backend/
- website-monitoring-frontend/ → frontend/
- website-monitoring-devops/   → devops/

Update all references in package.json scripts, CI workflows,
docker-compose, pre-commit hooks, and documentation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/app/api/debug/crawl-status/[websiteId]/route.ts

@@ -0,0 +1,34 @@
+import { NextResponse } from "next/server";
+import { getSupabaseAdmin } from "@/lib/admin";
+
+export async function GET(
+  request: Request,
+  context: { params: Promise<{ websiteId: string }> },
+) {
+  try {
+    const { websiteId } = await context.params;
+
+    // Get crawl sessions for this website
+    const { data: sessions, error: sessionsError } = await getSupabaseAdmin()
+      .from("crawl_sessions")
+      .select("*")
+      .eq("website_id", websiteId)
+      .order("created_at", { ascending: false });
+
+    // Get all pages for this website
+    const { data: pages, error: pagesError } = await getSupabaseAdmin()
+      .from("pages")
+      .select("*")
+      .eq("website_id", websiteId)
+      .order("created_at", { ascending: false });
+
+    return NextResponse.json({
+      sessions,
+      sessionsError,
+      pages,
+      pagesError,
+    });
+  } catch (err) {
+    return NextResponse.json({ error: String(err) }, { status: 500 });
+  }
+}