Split the registration request model from the registered-client record #3701

Job	Run time
checks / docs	54s
checks / readme-snippets	12s
checks / pre-commit	1m 6s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.12, locked, windows-latest)	2m 16s
checks / test (3.11, locked, ubuntu-latest)	1m 21s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 12s
checks / test (3.10, locked, ubuntu-latest)	1m 27s
checks / test (3.13, locked, ubuntu-latest)	1m 17s
checks / test (3.11, lowest-direct, windows-latest)	1m 35s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 24s
checks / test (3.12, lowest-direct, windows-latest)	1m 44s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 23s
checks / test (3.13, lowest-direct, windows-latest)	2m 6s
checks / test (3.11, locked, windows-latest)	1m 46s
checks / test (3.14, locked, ubuntu-latest)	1m 23s
checks / test (3.12, locked, ubuntu-latest)	1m 34s
checks / test (3.13, locked, windows-latest)	1m 52s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.14, locked, windows-latest)	1m 59s
checks / test (3.10, lowest-direct, windows-latest)	1m 47s
checks / test (3.10, locked, windows-latest)	2m 58s
checks / test (3.14, lowest-direct, windows-latest)	2m 2s
all-green	5s
	35m 41s

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