refactor: replace lowlevel Server decorators with on_* constructor kwargs #581

Job	Run time
checks / pre-commit	30s
checks / readme-snippets	11s
checks / test (3.12, lowest-direct, ubuntu-latest)	4m 57s
checks / test (3.10, lowest-direct, ubuntu-latest)	5m 0s
checks / test (3.11, lowest-direct, ubuntu-latest)	4m 59s
checks / test (3.12, locked, windows-latest)	5m 55s
checks / test (3.12, lowest-direct, windows-latest)	6m 5s
checks / test (3.10, locked, windows-latest)	5m 36s
checks / test (3.13, lowest-direct, windows-latest)	5m 33s
checks / test (3.11, lowest-direct, windows-latest)	6m 1s
checks / test (3.13, lowest-direct, ubuntu-latest)	4m 56s
checks / test (3.10, locked, ubuntu-latest)	5m 1s
checks / test (3.11, locked, windows-latest)	5m 30s
checks / test (3.14, lowest-direct, ubuntu-latest)	5m 7s
checks / test (3.14, locked, windows-latest)	6m 44s
checks / test (3.13, locked, windows-latest)	5m 49s
checks / test (3.14, locked, ubuntu-latest)	6m 16s
checks / test (3.13, locked, ubuntu-latest)	4m 50s
checks / test (3.10, lowest-direct, windows-latest)	6m 27s
checks / test (3.12, locked, ubuntu-latest)	4m 53s
checks / test (3.11, locked, ubuntu-latest)	4m 52s
checks / test (3.14, lowest-direct, windows-latest)	6m 26s
all-green	4s
	1h 51m 42s

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