fix: allow extra fields on RequestParams to match TypeScript SDK #1069

Job	Run time
checks / pre-commit	41s
checks / readme-snippets	13s
checks / test (3.10, lowest-direct, windows-latest)	2m 18s
checks / test (3.10, locked, ubuntu-latest)	50s
checks / test (3.10, locked, windows-latest)	2m 12s
checks / test (3.11, locked, ubuntu-latest)	53s
checks / test (3.11, locked, windows-latest)	2m 17s
checks / test (3.11, lowest-direct, windows-latest)	2m 37s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.11, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.12, lowest-direct, windows-latest)	3m 40s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.12, locked, windows-latest)	3m 16s
checks / test (3.13, lowest-direct, ubuntu-latest)	56s
checks / test (3.14, locked, windows-latest)	3m 10s
checks / test (3.13, locked, ubuntu-latest)	46s
checks / test (3.14, lowest-direct, windows-latest)	2m 17s
checks / test (3.13, lowest-direct, windows-latest)	2m 26s
checks / test (3.14, locked, ubuntu-latest)	2m 20s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 25s
checks / test (3.13, locked, windows-latest)	2m 22s
all-green	5s
	38m 37s

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