test: update workflow configuration and Financial Agent JSON structure (nightly fix) (#7112)

* ✅ (test_apply_json_filter.py): update test data generation to exclude whitespace characters and control characters in dictionary keys to improve data quality and reliability

* fix tests

src/backend/tests/unit/template/utils/test_apply_json_filter.py

@@ -80,7 +80,8 @@ def test_complex_nested_access(data):
 
 
 # Test array operations on objects
-@given(data=st.lists(st.dictionaries(keys=st.text(), values=st.integers(), min_size=1), min_size=1))
+@given(data=st.lists(st.dictionaries(keys=st.text(min_size=1).filter(lambda s: s.strip() and not any(c in s for c in "\r\n\t")), 
+                                     values=st.integers(), min_size=1), min_size=1))
 def test_array_object_operations(data):
     if data and all(data):
         key = next(iter(data[0]))