feat: automated Qdrant sync with Mistral embeddings + Kabelhandbuch ingestion

- Switch embedding API from OpenRouter to Mistral mistral-embed (1024-dim, EU/DSGVO)
- Add afterChange/afterDelete hooks to Posts.ts and Pages.ts for live sync
- Integrate kabelhandbuch.txt parsing into /api/sync-qdrant boot route
- Add .gitignore entries for kabelhandbuch.txt

app/api/sync-qdrant/route.ts

@@ -106,8 +106,47 @@ export async function GET() {
       }
     }
 
+    // ── Kabelhandbuch (Static Text) ──
+    const os = require('os');
+    const path = require('path');
+    const fs = require('fs');
+    const crypto = await import('crypto');
+
+    const txtPath = path.join(process.cwd(), 'kabelhandbuch.txt');
+    let manualChunks = 0;
+
+    if (fs.existsSync(txtPath)) {
+      try {
+        const text = fs.readFileSync(txtPath, 'utf8');
+        const chunks = text
+          .split(/\n\s*\n/)
+          .map((c: string) => c.trim())
+          .filter((c: string) => c.length > 50);
+
+        for (let i = 0; i < chunks.length; i++) {
+          const chunkText = chunks[i];
+          const syntheticId = crypto.randomUUID();
+
+          await upsertProductVector(syntheticId, chunkText, {
+            type: 'knowledge',
+            content: chunkText,
+            data: {
+              title: `Kabelhandbuch Wissen - Bereich ${i + 1}`,
+              source: 'Kabelhandbuch KLZ.pdf',
+            },
+          });
+          manualChunks++;
+        }
+        console.log(`[Qdrant Sync] ✅ ${manualChunks} Kabelhandbuch-Chunks synced`);
+      } catch (e: any) {
+        results.errors.push(`kabelhandbuch: ${e.message}`);
+      }
+    } else {
+      console.log(`[Qdrant Sync] ⚠️ skipped Kabelhandbuch: ${txtPath} not found`);
+    }
+
     console.log(
-      `[Qdrant Sync] ✅ ${results.products} products, ${results.posts} posts, ${results.pages} pages synced`,
+      `[Qdrant Sync] ✅ ${results.products} products, ${results.posts} posts, ${results.pages} pages synced, ${manualChunks} manual chunks synced`,
     );
 
     return NextResponse.json({