ci: add strict-no-cover to detect unnecessary coverage pragmas #294

Job	Run time
checks / pre-commit	35s
checks / readme-snippets	10s
checks / test (3.11, lowest-direct, ubuntu-latest)	44s
checks / test (3.10, lowest-direct, windows-latest)	2m 42s
checks / test (3.11, lowest-direct, windows-latest)	2m 38s
checks / test (3.10, lowest-direct, ubuntu-latest)	48s
checks / test (3.12, lowest-direct, ubuntu-latest)	54s
checks / test (3.13, lowest-direct, windows-latest)	2m 52s
checks / test (3.10, locked, ubuntu-latest)	44s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 13s
checks / test (3.12, lowest-direct, windows-latest)	3m 45s
checks / test (3.14, locked, windows-latest)	4m 23s
checks / test (3.12, locked, windows-latest)	3m 33s
checks / test (3.11, locked, windows-latest)	2m 33s
checks / test (3.11, locked, ubuntu-latest)	44s
checks / test (3.10, locked, windows-latest)	2m 37s
checks / test (3.12, locked, ubuntu-latest)	51s
checks / test (3.14, locked, ubuntu-latest)	2m 26s
checks / test (3.14, lowest-direct, windows-latest)	2m 26s
checks / test (3.13, locked, ubuntu-latest)	43s
checks / test (3.13, locked, windows-latest)	2m 14s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
all-green	5s
	40m 24s

Provide feedback