fix: reuse structured constraints for MySQL inline CHECK #989

Job	Run time
Grammar Choice Conflicts	31s
Gradle Check (macos-latest)	2m 46s
Gradle Check (ubuntu-latest)	3m 37s
Gradle Check (windows-latest)	3m 10s
Maven Verify (macos-latest)	4m 4s
Maven Verify (windows-latest)	3m 29s
Maven Verify (ubuntu-latest)	3m 30s
Build & Deploy Sphinx Docs	1s
Gradle Publish (Maven Central)	1s
	21m 9s

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