feat: [Validation] add support for `$dbGroup` as parameter in `is_unique` and `is_not_unique` #8423

	# When a PR is opened or a push is made, check code
	# for duplication with PHP Copy/Paste Detector.
	name: PHPCPD

	on:
	pull_request:
	branches:
	- 'develop'
	- '4.*'
	paths:
	- 'app/**.php'
	- 'public/**.php'
	- 'system/**.php'
	- '.github/workflows/test-phpcpd.yml'
	push:
	branches:
	- 'develop'
	- '4.*'
	paths:
	- 'app/**.php'
	- 'public/**.php'
	- 'system/**.php'
	- '.github/workflows/test-phpcpd.yml'

	jobs:
	phpcpd:
	uses: codeigniter4/.github/.github/workflows/phpcpd.yml@main
	with:
	dirs: "app/ public/ system/"
	options: >-
	--exclude system/Test
	--exclude system/ThirdParty
	--exclude system/Database/SQLSRV/Builder.php
	--exclude system/Database/SQLSRV/Forge.php
	--exclude system/Database/MySQLi/Builder.php
	--exclude system/Database/OCI8/Builder.php
	--exclude system/Database/Postgre/Builder.php
	--exclude system/Debug/Exceptions.php
	--exclude system/HTTP/SiteURI.php
	--exclude system/Validation/Rules.php
	--exclude system/Autoloader/Autoloader.php
	--exclude system/Config/Filters.php

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