fix: add missing session constants and fix jest.Mock type #5411

Job	Run time
build-and-check	2m 42s
test-integration-packages/billing	47s
test-integration-common	48s
test-packages/agent-runtime	54s
test-integration-packages/internal	43s
test-integration-web	46s
test-cli	1m 16s
test-integration-cli	43s
test-integration-packages/agent-runtime	38s
test-.agents	43s
test-sdk	46s
test-integration-sdk	42s
test-integration-.agents	39s
test-packages/internal	51s
test-packages/billing	44s
test-common	51s
test-web	51s
	15m 24s

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