Tests

Restore chat's original model on resume #417 #1378

Job	Run time
unit-test (ubuntu-24.04, 24)	55s
unit-test (windows-latest, 24)	1m 44s
graalvm-build	4m 52s
jvm-integration-test (windows-latest, 24)	6m 39s
unit-test (macos-latest, 24)	3m 21s
jvm-integration-test (macos-latest, 24)	7m 2s
jvm-integration-test (ubuntu-24.04, 24)	3m 24s
nix-build	7m 44s
graalvm-integration-test	1m 5s
	36m 46s

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