Add User-Agent #1846

Job	Run time
fmt	6s
clippy (ubuntu-latest)	1m 37s
clippy (macos-latest)	38s
clippy (windows-latest)	2m 19s
test-minimal-container	2m 15s
coverage-integration (ubuntu-latest)	5m 51s
coverage-integration (macos-latest)	2m 25s
test (ubuntu-latest)	1m 57s
coverage-unit (ubuntu-latest)	2m 24s
test (macos-latest)	44s
coverage-unit (macos-latest)	1m 10s
coverage-unit (windows-latest)	3m 55s
upload-coverage	3s
	25m 24s

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