fix: trim down Zensical, fix copyright year #2158

Job	Run time
change-detection / Identify source changes	9s
cookie / Check included Noxfile	1m 31s
cookie / Format	1m 31s
cookie / Distribution build	1m 56s
cookie / Check Python 3.14 on macos-latest	1m 35s
cookie / Check Python 3.14 on windows-latest	1m 46s
cookie / Check Python pypy-3.11 on ubuntu-latest	1m 22s
cookie / Check Python 3.10 on ubuntu-latest	1m 55s
cookie / Check Python 3.14 on ubuntu-latest	1m 49s
cookie / Check Python 3.10 on macos-latest	1m 24s
cookie / Check Python 3.14 on macos-15-intel	1m 56s
cookie / Check Python 3.10 on macos-15-intel	1m 41s
cookie / Check Python 3.10 on windows-latest	1m 46s
rr-tests	0s
cookie / pass	3s
pass	5s
	20m 29s

Provide feedback