feat: use firm's own templates as style guide for AI-drafted petitions

Belge Şablonları uploads now also get extracted_text (same OCR/office
pipeline as documents), and a new POST /api/drafting/generate builds
a real AI draft from the case's actual data (title, UYAP parties,
latest Dosya Özeti) — if the lawyer picks one of their own templates,
its extracted text is passed as a style/format reference only (the
prompt explicitly forbids copying the template's old case facts).
Dilekçe Hazırlama no longer fakes a draft with setTimeout.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/routes/drafting.routes.ts

@@ -0,0 +1,9 @@
+import { Router } from 'express';
+import { requireAuth } from '../middleware/auth';
+import { generateDraft } from '../controllers/drafting.controller';
+
+const router = Router();
+
+router.post('/generate', requireAuth, generateDraft);
+
+export default router;