Validate endpoint error message format

[Alessandro100]

When validating a GBFS feed with the validate endpoint, if there is an error, the error message has the property instancePath included at the beginning of the string. This is not the expected behaviour, it should only be the message without the instancePath property

Current state
message = instancePath + message

Expected state
message = message

[testower]

This is the output from the validator lib. It makes sense. The message is what is intended for humans to read. The others can be used by programs to find more information that can be shown to the user.

[Alessandro100]

yes exactly, the message is currently
#/data/bikes/1/last_reported: expected type: Integer, found: BigDecimal
when it should just be
expected type: Integer, found: BigDecimal

From the UI perspective of the message in current state I would need to parse #/data/bikes/1/last_reported: out of the message

[testower]

Let's save further discussion for the meeting