Add client callbacks for list_changed notifications #1414

Job	Run time
checks / pre-commit	31s
checks / readme-snippets	13s
checks / test (3.11, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.10, lowest-direct, windows-latest)	2m 59s
checks / test (3.11, locked, ubuntu-latest)	49s
checks / test (3.10, locked, ubuntu-latest)	57s
checks / test (3.11, locked, windows-latest)	2m 58s
checks / test (3.12, lowest-direct, windows-latest)	3m 42s
checks / test (3.10, locked, windows-latest)	2m 16s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.10, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, locked, windows-latest)	2m 22s
checks / test (3.11, lowest-direct, windows-latest)	2m 44s
checks / test (3.13, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, locked, windows-latest)	3m 31s
checks / test (3.13, lowest-direct, windows-latest)	2m 33s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 23s
checks / test (3.14, locked, windows-latest)	3m 14s
checks / test (3.14, locked, ubuntu-latest)	2m 23s
checks / test (3.14, lowest-direct, windows-latest)	2m 25s
all-green	4s
	40m 34s

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