feat(indexing): Lot 4 - Progression temps reel, Full Rebuild, Optimisations

- Ajout migrations DB: index_job_errors, library_monitoring, full_rebuild_type
- API: endpoints progression temps reel (/jobs/:id/stream), active jobs, details
- API: support full_rebuild avec suppression donnees existantes
- Indexer: logs detailles avec timing [SCAN][META][PARSER][BDD]
- Indexer: optimisation parsing PDF (lopdf -> pdfinfo) 235x plus rapide
- Indexer: corrections chemins LIBRARIES_ROOT_PATH pour dev local
- Backoffice: composants JobProgress, JobsIndicator (header), JobsList
- Backoffice: SSE streaming pour progression temps reel
- Backoffice: boutons Index/Index Full sur page libraries
- Backoffice: highlight job apres creation avec redirection
- Fix: parsing volume type i32, sync meilisearch cleanup

Perf: parsing PDF passe de 8.7s a 37ms
Perf: indexation 45 fichiers en ~15s vs plusieurs minutes avant

apps/backoffice/app/api/jobs/[id]/cancel/route.ts

@@ -0,0 +1,36 @@
+import { NextRequest, NextResponse } from "next/server";
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params;
+  const apiBaseUrl = process.env.API_BASE_URL || "http://api:8080";
+  const apiToken = process.env.API_BOOTSTRAP_TOKEN;
+  
+  if (!apiToken) {
+    return NextResponse.json({ error: "API token not configured" }, { status: 500 });
+  }
+  
+  try {
+    const response = await fetch(`${apiBaseUrl}/index/cancel/${id}`, {
+      method: "POST",
+      headers: {
+        Authorization: `Bearer ${apiToken}`,
+      },
+    });
+    
+    if (!response.ok) {
+      return NextResponse.json(
+        { error: `API error: ${response.status}` },
+        { status: response.status }
+      );
+    }
+    
+    const data = await response.json();
+    return NextResponse.json(data);
+  } catch (error) {
+    console.error("Proxy error:", error);
+    return NextResponse.json({ error: "Failed to cancel job" }, { status: 500 });
+  }
+}