feat: Add Markdown export service for DOCX and PDF formats

- Implemented MarkdownExportService to convert Markdown text into DOCX and PDF formats.
- Supported Markdown elements include headings, bold, italic, blockquotes, tables, and specific emojis.
- Added methods for generating DOCX and PDF documents with proper formatting and rendering.
- Enhanced application properties to enable logging for production environment.
- Introduced a test-run script to reset project state and trigger processing via API.

Co-authored-by: Copilot <copilot@github.com>

dc-backend/test-run.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+# Setzt Projekt auf Ausgangszustand (status=NULL) und triggert POST /check/{id}
+# Verwendung: bash test-run.sh [projectId]
+
+set -euo pipefail
+
+PROJECT_ID="${1:-1}"
+BACKEND="http://localhost:8090"
+DB_USER="wksp_ai"
+DB_PASS='s!)löyx209aasgtrasdasiudkash5235FDSXljLJ'
+DB_HOST="10.75.10.171"
+DB_PORT="32710"
+DB_SID="freepdb1"
+KUBECONFIG_FILE="$(cd "$(dirname "$0")/.." && pwd)/env/frigo-dev.yaml"
+
+echo "=== Test-Run: Projekt $PROJECT_ID ==="
+
+# 1. Projekt zurücksetzen (status=NULL, progress=0, completed_at=NULL)
+#    Ergebnisse löschen, aber original_text/translated_text BLEIBEN erhalten
+#    → Phase A (OCR) wird beim nächsten Lauf automatisch übersprungen
+echo ""
+echo "→ DB-Reset: status=NULL, Ergebnisse löschen (Texte bleiben) ..."
+sql -S "$DB_USER/$DB_PASS@$DB_HOST:$DB_PORT/$DB_SID" <<SQL
+DELETE FROM dc_results WHERE project_id = $PROJECT_ID;
+UPDATE dc_projects
+SET    status       = NULL,
+       progress     = 0,
+       completed_at = NULL
+WHERE  id = $PROJECT_ID;
+COMMIT;
+SELECT id, name, status, catalog_id, progress FROM dc_projects WHERE id = $PROJECT_ID;
+SQL
+
+# 2. Port-Forward sicherstellen (im Hintergrund, falls noch nicht aktiv)
+if ! curl -sf "$BACKEND/check/health" > /dev/null 2>&1; then
+    echo ""
+    echo "→ Starte Port-Forward localhost:8090 → dc-backend:8090 ..."
+    KUBECONFIG="$KUBECONFIG_FILE" kubectl port-forward \
+        -n ai-env svc/dc-backend 8090:8090 &
+    PF_PID=$!
+    echo "  Port-Forward PID: $PF_PID"
+    sleep 3
+else
+    PF_PID=""
+    echo "→ Port-Forward bereits aktiv."
+fi
+
+# 3. Trigger
+echo ""
+echo "→ POST $BACKEND/check/$PROJECT_ID ..."
+RESPONSE=$(curl -sf -X POST "$BACKEND/check/$PROJECT_ID" \
+    -H "Content-Type: application/json" || echo "FEHLER: curl fehlgeschlagen")
+echo "  Response: $RESPONSE"
+
+# 4. Logs streamen
+echo ""
+echo "→ Logs (Ctrl+C zum Beenden):"
+POD=$(KUBECONFIG="$KUBECONFIG_FILE" kubectl get pod -n ai-env -l app=dc-backend \
+    --field-selector=status.phase=Running \
+    -o jsonpath='{.items[0].metadata.name}' 2>/dev/null)
+KUBECONFIG="$KUBECONFIG_FILE" kubectl logs -f "$POD" -n ai-env --since=10s
+
+# Cleanup Port-Forward
+if [ -n "${PF_PID:-}" ]; then
+    kill "$PF_PID" 2>/dev/null || true
+fi