fix(db): Remove trailing comma in migration journal JSON #5718

Job	Run time
build-and-check	3m 0s
test-integration-packages/internal	1m 0s
test-integration-sdk	42s
test-integration-common	43s
test-integration-packages/billing	1m 8s
test-integration-packages/agent-runtime	48s
test-integration-cli	48s
test-integration-web	39s
test-web	44s
test-cli	50s
test-packages/billing	41s
test-common	48s
test-.agents	40s
test-sdk	47s
test-packages/internal	52s
test-packages/agent-runtime	43s
	14m 53s

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