Implementing metadata freshness checks (#481) #1434

Job	Run time
build packages	23s
linter	1m 23s
unit test / python 3.8	1m 43s
unit test / python 3.9	1m 36s
unit test / python 3.10	1m 34s
unit test / python 3.11	1m 26s
verify packages / python 3.8 / ubuntu-latest	1m 21s
verify packages / python 3.9 / ubuntu-latest	1m 14s
verify packages / python 3.10 / ubuntu-latest	1m 14s
verify packages / python 3.11 / ubuntu-latest	1m 43s
verify packages / python 3.8 / macos-latest	1m 30s
verify packages / python 3.9 / macos-latest	2m 24s
verify packages / python 3.10 / macos-latest	2m 25s
verify packages / python 3.11 / macos-latest	2m 30s
verify packages / python 3.8 / windows-latest	3m 47s
verify packages / python 3.9 / windows-latest	4m 32s
verify packages / python 3.10 / windows-latest	4m 4s
verify packages / python 3.11 / windows-latest	3m 52s
	38m 41s

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