Add broker_max_dismissed_requests configuration and update dispatcher… #790

Job	Run time
pre-commit	13s
combine-environments	7s
unit-tests (3.11)	3m 26s
integration-tests (3.11, -integration)	1m 3s
type-check	46s
docs-build	38s
distribution	0s
upload-to-pypi	0s
	6m 13s

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