probe: IGV-D-028 attribution measurement (App-authored) — DO NOT MERGE

[wave-av-agent]

Throwaway measurement PR for the require_extra_approval_for_unattributed_changes ruleset parameter on main: one commit and the PR itself authored by the wave-av-agent App (a non-Copilot App identity). Reads reviewDecision / mergeStateStatus and is then closed. Never merged; branch kept.

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Summary by Sourcery

Add an App-authored probe to measure how unattributed-change approval rules handle non-Copilot App identities.

Documentation:

• Add documentation for an App-authored attribution probe measuring ruleset behavior for unattributed changes.

Chores:

• Add a throwaway probe artifact intended for measurement only and not for merging.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This throwaway PR adds a single probe document describing an App-authored commit/PR used to observe review-decision and merge-state behavior under the attribution approval ruleset; it contains no production code and is intended to be closed without merging.

File-Level Changes

Change	Details	Files
Adds a documentation-only probe to measure attribution ruleset behavior for an App-authored commit and pull request.	Documents the target require_extra_approval_for_unattributed_changes parameter and test identity. Records that the probe is temporary, will be closed, and must never be merged.	docs/probes/IGV-D-028-attribution-probe-app.md

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