[PR] Prune superseded integration-test cache generations [maven]

["slachiewicz (via GitHub)" <gi...@apache.org>]

slachiewicz opened a new pull request, #13616:
URL: https://github.com/apache/maven/pull/13616

   Each change to the integration-test POMs saves a new `it-m2-repo` generation per OS, and the IT job restores only the exact key or the newest fallback, so older generations just take up the 10 GB cache budget. A new `prune-caches` job runs after a push and keeps the newest `it-m2-repo` key per OS on the branch. It is the only job with `actions: write`, which deleting caches requires, and it checks out no code. If a save failed, the previous generation is still the newest and stays.
   
   Verified: the job's selection run against the current caches → keeps one entry per OS and deletes 8 older ones (2.2 GB) here and 15 (3.8 GB) on `maven-3.9.x`.


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Re: [PR] Prune superseded integration-test cache generations [maven]

["slachiewicz (via GitHub)" <gi...@apache.org>]

slachiewicz merged PR #13616:
URL: https://github.com/apache/maven/pull/13616


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