fix: add more test cases

Author: p-eye

test/test_value_converter_factory.rb

@@ -269,6 +269,10 @@ def test_time
           ).create_converter
           assert_equal nil, converter.call(nil)
           assert_equal "00:03:22.000000", converter.call("00:03:22")
+          assert_equal "15:22:00.000000", converter.call("3:22 PM")
+          assert_equal "03:22:00.000000", converter.call("3:22 AM")
+          assert_equal "15:22:00.000000", converter.call("15:22")
+          assert_equal "10:00:00.000000", converter.call("2024-07-24 10:00")
         end
 
         def test_record