refactor: replace lowlevel Server decorators with on_* constructor kwargs #597

Job	Run time
checks / readme-snippets	13s
checks / pre-commit	30s
checks / test (3.11, locked, windows-latest)	5m 32s
checks / test (3.13, lowest-direct, ubuntu-latest)	4m 48s
checks / test (3.13, locked, windows-latest)	6m 32s
checks / test (3.13, lowest-direct, windows-latest)	5m 44s
checks / test (3.10, lowest-direct, ubuntu-latest)	4m 55s
checks / test (3.13, locked, ubuntu-latest)	4m 58s
checks / test (3.12, locked, windows-latest)	5m 59s
checks / test (3.11, lowest-direct, windows-latest)	5m 31s
checks / test (3.14, locked, ubuntu-latest)	6m 14s
checks / test (3.12, locked, ubuntu-latest)	5m 34s
checks / test (3.14, locked, windows-latest)	7m 43s
checks / test (3.14, lowest-direct, ubuntu-latest)	5m 10s
checks / test (3.12, lowest-direct, ubuntu-latest)	5m 1s
checks / test (3.10, locked, windows-latest)	5m 28s
checks / test (3.14, lowest-direct, windows-latest)	6m 10s
checks / test (3.12, lowest-direct, windows-latest)	6m 5s
checks / test (3.10, locked, ubuntu-latest)	5m 30s
checks / test (3.10, lowest-direct, windows-latest)	7m 17s
checks / test (3.11, locked, ubuntu-latest)	5m 28s
checks / test (3.11, lowest-direct, ubuntu-latest)	5m 28s
all-green	2s
	1h 55m 52s

Provide feedback