fix(invoicing): return clear error on Facturapi config issues instead of 500

pos/blueprints/invoicing_bp.py

@@ -12,6 +12,7 @@ from flask import Blueprint, g, jsonify, request
 from middleware import require_auth
 from services import facturapi_service
 from services.audit import log_action
+from services.facturapi_service import FacturapiError
 from services.cfdi_facturapi_builder import (
     build_egreso_payload,
     build_ingreso_payload,
@@ -694,6 +695,11 @@ def facturapi_setup():
         cur.close()
         conn.close()
         return jsonify({"error": str(e)}), 400
+    except FacturapiError as e:
+        conn.rollback()
+        cur.close()
+        conn.close()
+        return jsonify({"error": str(e)}), 400
     except Exception as e:
         conn.rollback()
         cur.close()