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Title:
Migration Issue to Play Framework 3.0.0: NoClassDefFoundError: javax/validation/ConstraintValidatorFactory

Body:

I'm migrating a Play Framework application from 2.9.4 to 3.0.0 to adopt Jakarta Bean Validation (jakarta.validation.constraints.*) since Play 2.9 still relies on the old javax.validation package and does not support annotations like @NotNull, @notblank, etc. from Jakarta.

After updating the necessary configurations and dependencies, I'm encountering the following error at startup:

play.api.UnexpectedException: Unexpected exception[NoClassDefFoundError: javax/validation/ConstraintValidatorFactory]
Caused by: java.lang.NoClassDefFoundError: javax/validation/ConstraintValidatorFactory
...
It seems like the application is still expecting javax.validation instead of jakarta.validation, even though I've added the following dependencies in build.sbt:

"jakarta.validation" % "jakarta.validation-api" % "3.1.1",
"org.hibernate" % "hibernate-validator" % "9.0.0.Beta3",
"org.hibernate" % "hibernate-validator-annotation-processor" % "9.0.0.Beta3",
"org.glassfish" % "jakarta.el" % "4.0.2",
"com.sun.el" % "el-ri" % "3.0.4"
My build.properties:

sbt.version=1.10.6
Play version in plugins.sbt:

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.9.4") // legacy
I updated build.sbt to use Play 3.0.0:

"org.playframework" %% "play-pekko-http-server" % "3.0.0",
"org.playframework" %% "play-pekko-http2-support" % "3.0.0"
I suspect the issue is due to the Play framework still internally relying on javax.validation instead of jakarta.validation.

Question:
How can I ensure my Play 3.0.0 application uses Jakarta Bean Validation (jakarta.validation) properly and completely avoids references to javax.validation?