ci: Protect workflows via CODEOWNERS and explicit user matching #726

Job	Run time
test-no-erdantic-version	1m 7s
test-latest-version	2m 24s
test-stable-versions (3.8, 20, 45)	2m 49s
test-stable-versions (3.9, 20, 45)	1m 27s
test-development-versions-deps	1m 6s
test-stable-versions (3.9, 20, 53)	1m 55s
test-stable-versions (3.10, 20, 62)	1m 48s
test-stable-versions (3.10, 20, 70)	1m 41s
test-linter	10s
test-stable-versions (3.11, 20, 70)	1m 22s
test-stable-versions (3.11, 21, 71)	1m 47s
test-stable-versions (3.11, 22, 71)	1m 17s
test-stable-versions (3.11, 23, 71)	1m 20s
test-stable-versions (3.11, 24, 72)	1m 18s
test-stable-versions (3.12, 25, 72)	1m 25s
test-stable-versions (3.12, 26, 72)	1m 22s
	24m 18s

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