Merge commit '36c66dd290d3ce6eb1ccd310d0c658d4a32bb8eb' as 'repos/effect'

repos/effect/.changeset/fix-schema-union-dispatch-order.md

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+---
+"effect": patch
+---
+
+Fix union candidate selection and decoding order so that unions now:
+
+- consider matches from every sentinel key instead of dropping valid members after the first match;
+- reject ambiguous `oneOf` inputs when members with different sentinel keys both match;
+- preserve declared member order when combining discriminated members with non-discriminated fallbacks;
+- commit concurrent decoding results in declaration order instead of completion order.
+
+Reserved SSE failure event names with non-`Cause` data are now emitted as application events instead of producing a runtime defect.