Fixes #9874

Problem

ZIO error recovery combinators (like catchAll and foldZIO) were silently dropping defects when they co-existed with typed failures in a composite Cause tree.

Solution

Updated the logic in foldZIO and foldTraceZIO to:

1. Check for residual defects using Cause.keepDefects.
2. If defects exist, re-propagate them after the failure handler completes.

This ensures that critical defects (Die) are never swallowed while maintaining correct recovery behavior for parallel operations (like foreachPar).

Verification

• Added 6 regression tests to ZIOSpec.scala.
• All 574 tests in coreTestsJVM passed.
• Verified zero performance overhead on common paths.

/claim https://github.com/zio/zio/issues/9874