chore(ci): trigger daily CI in v3.x-java branch

[rishav-karanjit]

How daily CI in v3.xJava Works?

1. 13:00 UTC weekday — GitHub fires daily_ci_java_3x.yml on main (schedule only runs from default branch). This is just the dispatcher.

2. The dispatcher job runs — it calls the GitHub API:

   createWorkflowDispatch({
     workflow_id: 'daily_ci.yml',
     ref: 'v3.x-Java'
   })
   

   This tells GitHub: "trigger daily_ci.yml on branch v3.x-Java."

3. GitHub receives the API call — it looks at daily_ci.yml on the v3.x-Java branch and checks: "does this workflow accept workflow_dispatch as a trigger?" If yes, it starts a new workflow run. If no, the API call fails.

4. GitHub starts a new run of daily_ci.yml — this run is associated with v3.x-Java, not main. So when the jobs do actions/checkout (with no ref), they check out v3.x-Java code.

5. Result: Two separate workflow runs happen — the dispatcher (on main) and the real CI (on v3.x-Java). All reusable workflows run against v3.x-Java without any modifications.

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[rishav-karanjit]

Done in different way