fix(sdk)!: enforce sane visibility #1525

Job	Run time
Validate PR title	3s
mavenverify	2m 44s
platform-integration	3m 34s
platform-xtest / resolve-versions	10s
platform-xtest / xct (v0.15.0, js@main)	14m 37s
platform-xtest / xct (main, js@main)	14m 10s
platform-xtest / xct (main, java@pull-371)	15m 16s
platform-xtest / xct (v0.15.0, java@pull-371)	18m 55s
platform-xtest / xct (v0.15.0, go@main)	13m 48s
platform-xtest / xct (main, java@v0.15.0)	18m 44s
platform-xtest / xct (main, go@main)	14m 35s
platform-xtest / xct (v0.15.0, java@v0.15.0)	16m 16s
platform-xtest / publish-results	3s
platform-xtest / xtest	3s
ci	3s
	2h 13m 1s

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