feat(ZMS-2936): code documentation #3959

Job	Run time
call-unit-tests / zmsclient-test	46s
call-unit-tests / zmsdb-test	3m 6s
call-unit-tests / zmsapi-test	2m 11s
call-unit-tests / module-test (zmsadmin, 8.0)	27s
call-unit-tests / module-test (zmscalldisplay, 8.0)	19s
call-unit-tests / module-test (zmsdldb, 8.0)	20s
call-unit-tests / module-test (zmsentities, 8.0)	22s
call-unit-tests / module-test (zmsmessaging, 8.0)	21s
call-unit-tests / module-test (zmsslim, 8.0)	20s
call-unit-tests / module-test (zmsstatistic, 8.0)	20s
call-unit-tests / module-test (zmsticketprinter, 8.0)	25s
call-build-images / build (zmsadmin, 8.0)	3m 18s
call-build-images / build (zmsapi, 8.0)	2m 11s
call-build-images / build (zmscalldisplay, 8.0)	2m 15s
call-build-images / build (zmsmessaging, 8.0)	1m 58s
call-build-images / build (zmsstatistic, 8.0)	2m 48s
call-build-images / build (zmsticketprinter, 8.0)	2m 40s
	24m 7s

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