feat: add initial SystemischeTherapieMedicationStatementMapper #799

Job	Run time
lint / verify Dockerfile base image signature	8s
build / build image	2m 51s
lint / dependency review	5s
lint / CodeQL analyze (java)	2m 41s
lint / validate gradle wrapper	11s
lint / MegaLinter	3m 5s
build / sign image	0s
build / image-provenance	0s
build / attest trivy vulnerability report	0s
build / upload slsa attestations to release assets	0s
run k8s smoke test	2m 59s
add-test-coverage	15s
release / release	0s
	12m 15s

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