[TASK] Add missing type for method getServicePathStatus

Small other code cleanups are done as well.

Resolves: #78861
Releases: master
Change-Id: I983e1f76d8ad46dd4d6c231b99b41ab8f05fe454
Reviewed-on: https://review.typo3.org/50844


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>