refactor: replace lowlevel Server decorators with on_* constructor kwargs #599

Job	Run time
checks / readme-snippets	12s
checks / test (3.13, lowest-direct, windows-latest)	6m 7s
checks / test (3.10, locked, ubuntu-latest)	4m 51s
checks / test (3.13, locked, windows-latest)	5m 50s
checks / test (3.11, lowest-direct, ubuntu-latest)	4m 52s
checks / test (3.13, locked, ubuntu-latest)	4m 47s
checks / test (3.14, lowest-direct, windows-latest)	5m 31s
checks / test (3.11, locked, ubuntu-latest)	4m 49s
checks / test (3.10, locked, windows-latest)	5m 29s
checks / test (3.12, lowest-direct, windows-latest)	6m 7s
checks / test (3.12, locked, windows-latest)	6m 1s
checks / test (3.10, lowest-direct, windows-latest)	5m 34s
checks / test (3.14, locked, windows-latest)	7m 24s
checks / test (3.11, lowest-direct, windows-latest)	5m 31s
checks / test (3.14, lowest-direct, ubuntu-latest)	5m 8s
checks / test (3.10, lowest-direct, ubuntu-latest)	5m 32s
checks / test (3.13, lowest-direct, ubuntu-latest)	4m 55s
checks / pre-commit	26s
checks / test (3.12, locked, ubuntu-latest)	4m 55s
checks / test (3.14, locked, ubuntu-latest)	6m 14s
checks / test (3.12, lowest-direct, ubuntu-latest)	4m 55s
checks / test (3.11, locked, windows-latest)	6m 3s
all-green	2s
	1h 51m 15s

Provide feedback