fix: missing headers and test doc processor version (#3062) #5956

Job	Run time
sample_operators_tests (sample-operators/mysql-schema)	3m 26s
sample_operators_tests (sample-operators/tomcat-operator)	3m 12s
sample_operators_tests (sample-operators/leader-election)	3m 42s
sample_operators_tests (sample-operators/webpage)	3m 42s
	14m 2s

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