refactor: replace lowlevel Server decorators with on_* constructor kwargs #638

Job	Run time
checks / pre-commit	23s
checks / test (3.11, locked, windows-latest)	6m 12s
checks / test (3.12, locked, windows-latest)	5m 51s
checks / test (3.11, lowest-direct, ubuntu-latest)	4m 38s
checks / test (3.14, lowest-direct, ubuntu-latest)	5m 39s
checks / test (3.12, locked, ubuntu-latest)	4m 42s
checks / test (3.10, locked, windows-latest)	5m 22s
checks / test (3.11, locked, ubuntu-latest)	4m 52s
checks / test (3.13, locked, ubuntu-latest)	4m 32s
checks / test (3.14, locked, ubuntu-latest)	6m 4s
checks / test (3.13, locked, windows-latest)	6m 1s
checks / test (3.12, lowest-direct, ubuntu-latest)	4m 43s
checks / test (3.13, lowest-direct, windows-latest)	5m 56s
checks / test (3.10, lowest-direct, windows-latest)	5m 31s
checks / readme-snippets	14s
checks / test (3.14, locked, windows-latest)	7m 15s
checks / test (3.11, lowest-direct, windows-latest)	6m 13s
checks / test (3.10, locked, ubuntu-latest)	4m 54s
checks / test (3.14, lowest-direct, windows-latest)	5m 24s
checks / test (3.12, lowest-direct, windows-latest)	5m 50s
checks / test (3.13, lowest-direct, ubuntu-latest)	4m 56s
checks / test (3.10, lowest-direct, ubuntu-latest)	4m 36s
all-green	4s
	1h 49m 52s

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