feat: Admin-Route für Queue-Status-Monitoring (closes #3)

src/routes/admin.py

@@ -0,0 +1,21 @@
+"""Flask-Blueprint für Admin-Route."""
+
+from flask import Blueprint, current_app, jsonify
+
+admin_bp = Blueprint("admin", __name__)
+
+
+@admin_bp.route("/admin/queue", methods=["GET"])
+def queue_status() -> tuple:
+    """Gibt Queue-Status zurück."""
+    qh = current_app.queue_handler  # type: ignore[attr-defined]
+    return jsonify({"queue_size": qh.queue_size(), "status": "ok"}), 200
+
+
+@admin_bp.route("/admin/stats", methods=["GET"])
+def stats() -> tuple:
+    """Gibt System-Statistiken zurück."""
+    qh = current_app.queue_handler  # type: ignore[attr-defined]
+    return jsonify(
+        {"queue_size": qh.queue_size(), "uptime": "placeholder", "version": "0.1.0"}
+    ), 200