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Fix issues found in a live self-hosted platform end-to-end test #246

Job	Run time
schema-compat	3m 48s
test (platform-api-integration)	2m 32s
postgres-concurrency	58s
test (platform-unit)	1m 29s
build-api-container	23s
lint-build-check	1m 6s
	10m 16s