feature: added flag which will add DEFECT_COUNT column to dq execute api

[dramala]

What type of PR is this?

improvement

What does this PR do / why is it needed ?

Added flag which will add DEFECT_COUNT column to dq execute api. Default of flag is false.

Also fixed previous issue of defectLimit not working when multiple validations executed.

Clarifications

1. The flag defectLimit is now applied on a per-validation basis rather than a global basis. This resolves previous issues where the limit did not function correctly when multiple validations were processed in a single request.
   previous behavior: The defectLimit was inconsistent or failed to apply correctly across multiple validations.
   current behavior If a user sets a defectLimit of n and execute r validations, the maximum potential rows returned is n * r. Example, if defectLimit = 10 and users executes 2 validations, the API will return up to 20 rows (10 for each), assuming enough defects are identified.

2. If the includeTotalDefectCount flag is present with multiple validations then, the added column will be validation specific meaning you will get results such as

Name	DEFECT_COUNT
Validation A	100
Validation A	100
Validation B	150
Validation B	150