refactor: replace lowlevel Server decorators with on_* constructor kwargs #632

Job	Run time
checks / pre-commit	16s
checks / test (3.14, lowest-direct, windows-latest)	5m 50s
checks / test (3.13, lowest-direct, windows-latest)	5m 36s
checks / test (3.10, locked, windows-latest)	5m 31s
checks / test (3.10, locked, ubuntu-latest)	4m 59s
checks / test (3.11, lowest-direct, windows-latest)	5m 36s
checks / test (3.10, lowest-direct, windows-latest)	5m 34s
checks / test (3.12, lowest-direct, ubuntu-latest)	4m 55s
checks / test (3.12, locked, ubuntu-latest)	5m 2s
checks / readme-snippets	12s
checks / test (3.13, locked, ubuntu-latest)	4m 56s
checks / test (3.14, locked, ubuntu-latest)	6m 14s
checks / test (3.14, lowest-direct, ubuntu-latest)	5m 13s
checks / test (3.13, locked, windows-latest)	5m 55s
checks / test (3.10, lowest-direct, ubuntu-latest)	4m 47s
checks / test (3.14, locked, windows-latest)	6m 40s
checks / test (3.11, locked, ubuntu-latest)	4m 48s
checks / test (3.13, lowest-direct, ubuntu-latest)	4m 49s
checks / test (3.11, locked, windows-latest)	5m 47s
checks / test (3.12, lowest-direct, windows-latest)	6m 8s
checks / test (3.12, locked, windows-latest)	6m 5s
checks / test (3.11, lowest-direct, ubuntu-latest)	4m 57s
all-green	5s
	1h 49m 55s

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