Refresh package-alist in call-back #55

Job	Run time
test (ubuntu-latest, 26.1)	53s
test (ubuntu-latest, 26.2)	53s
test (ubuntu-latest, 26.3)	50s
test (ubuntu-latest, 27.1)	45s
test (ubuntu-latest, 27.2)	47s
test (ubuntu-latest, 28.1)	46s
test (ubuntu-latest, 28.2)	46s
test (ubuntu-latest, 29.3)	58s
test (ubuntu-latest, snapshot)	43s
test (macos-latest, 28.2)	1m 29s
test (macos-latest, 29.3)	1m 41s
test (macos-latest, snapshot)	1m 28s
test (windows-latest, 26.1)	2m 2s
test (windows-latest, 26.2)	2m 7s
test (windows-latest, 26.3)	1m 40s
test (windows-latest, 27.1)	2m 13s
test (windows-latest, 27.2)	1m 30s
test (windows-latest, 28.1)	1m 15s
test (windows-latest, 28.2)	55s
test (windows-latest, 29.3)	1m 2s
test (windows-latest, snapshot)	34s
	25m 17s

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