Fix SimpleOutput annotation pruning for contains failures

[staging-devin-ai-integration]

Fix SimpleOutput pruning of annotations in failing contains items

Summary

This PR fixes a SimpleOutput annotation collection bug where annotations produced while evaluating a contains subschema were retained for array items that failed the contains subschema.

What changed

• SimpleOutput now prunes annotations using both:
  • evaluate path, and
  • instance location
    instead of evaluate path alone.
• For failures masked under contains (which are intentionally not emitted as output errors), SimpleOutput now still performs annotation cleanup on Post failure events before returning.
• Added a regression test covering:
  • contains with nested title
  • mixed array instance ["foo", 42, true]
  • verifies title annotation is kept only for /1 (the matching item) and dropped for /0 and /2.

Review & Testing Checklist for Human

• Confirm the new pruning condition (evaluate_path + instance_location) does not accidentally preserve/drop annotations in non-contains failure cases (especially nested schemas and sibling annotation keywords).
• Verify the masked-contains control flow change is correct: failures remain suppressed in output, but annotations from failing items are removed.
• Reproduce the original CLI example (contains + title + mixed array) and confirm only the matching item retains the title annotation in verbose output.

Notes

• Local checks run: make configure compile and make (test suite passed).
• Link to Devin Session: https://staging.itsdev.in/sessions/52568df4540441cf96cf151c3fdae262
• Requested by: bot_apk

[staging-devin-ai-integration]

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