docs(BA-6620): add news fragment

jopemachine · claude · jopemachine · commit 5c3cbe11fb27 · 2026-06-25T15:31:48.000+09:00
Co-Authored-By: Claude Opus 4.8 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/changes/12405.misc.md b/changes/12405.misc.md
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+Add a generic `ExistsQuerier` ops primitive (`SELECT EXISTS(...)`) and `AppConfigAllowListRepository.exists` built on it.

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	`1`	+Add a generic `ExistsQuerier` ops primitive (`SELECT EXISTS(...)`) and `AppConfigAllowListRepository.exists` built on it.