feat: implement sig handling & interruptible sleep; update app entryp… #33

Job	Run time
cache / build-cache	11s
lint / ruff-lint	8s
test / unit-test-coverage	10s
docker-build-and-image-scan / build-and-scan	1m 42s
release / Semantic-Release	1m 27s
release / Docker-Release / build-and-scan	1m 20s
	4m 58s

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