25.2.1
This PR cherry-picks changes from the original PR #24792 to branch 25.2. --- #### Original PR description > Add `@since` tags to public/protected API that lacked them, using the earliest version from which each element is continuously present up to the latest release. API first shipped in a maintenance release gets the full patch (e.g. 25.1.4); members whose value would merely repeat the enclosing type's are left untagged. > Co-authored-by: Artur Signell <artur@vaadin.com>