Respond 4xx when parameters are unrecognised

[leandro-cavalcante]

Description

As The message errors of the end point /policy-content are generic, The time for the user to find which parameter or value is missing can take longer time,

I want To provide the to the user specific error messages for missing parameters or wrong values,

so that can lead to a clear understanding on how to use the Policy Hub API

Acceptance Criteria

HTTP 400 Bad Request:

• [Missing mandatory query parameters (e.g., type, policyName, operatorType not provided)]
• [Invalid useCase parameter format]
• [Invalid type parameter format]
• [Invalid policyName parameter format]
• [Invalid operatorType parameter; expected values not met (e.g., not 'Equals', 'Contains', etc.)]
• [Invalid value parameter format]

HTTP 404 Not Found:

• [The endpoint itself does not exist]
• [The specified policyName is not supported]
• [The specified useCase is not supported]
• [The specified type is not supported]
• [The specified operatorType is not supported]
• [The specified value is not supported ]

Additional Information

i.e 400 error message:
{ "type": "https://tools.ietf.org/html/rfc7231#section-6.5.1", "title": "One or more validation errors occurred.", "status": 400, "errors": { "unknown": [ "Invalid values [111] set for key UsagePurpose. Possible values [cx.core.digitalTwinRegistry:1]" ] }, "errorId": "f5bddb28-72c2-4a30-ac86-aff5212cb74e", "details": [] }

i.e 404 message error:
{ "type": "https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.4", "title": "Cannot find representation of target resource.", "status": 404, "errors": { "Org.Eclipse.TractusX.PolicyHub.Service": [ "Missing required parameters: type." ] }, "errorId": "c314f6ca-8419-4650-ad92-70444a811447", "details": [] }