Tests

Dispatch handlers off protocol thread to prevent ECA unresponsiveness #1304

Job	Run time
jvm-integration-test (windows-latest, 24)	5m 35s
unit-test (ubuntu-24.04, 24)	51s
jvm-integration-test (macos-latest, 24)	6m 37s
unit-test (macos-latest, 24)	2m 44s
graalvm-build	4m 39s
jvm-integration-test (ubuntu-24.04, 24)	3m 18s
unit-test (windows-latest, 24)	1m 17s
nix-build	7m 56s
graalvm-integration-test	59s
	33m 56s

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