chore: upgrade feature-assess to gh-aw v0.88.7 (#4546)

* chore: upgrade feature-assess to gh-aw v0.88.7

Regenerate the feature assessment workflow on the current upstream baseline and add positive and negative compatibility checks.

Assisted-by: GitHub Copilot (model: GPT-5.6 Sol, autonomous)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* test: assert feature-assess safe output permissions

Assisted-by: GitHub Copilot (model: GPT-6 Astra, autonomous)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* test: enforce feature-assess trigger guards

Assisted-by: GitHub Copilot (model: GPT-6 Astra, autonomous)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: KSchlobohm

.github/aw/actions-lock.json

@@ -35,6 +35,11 @@
       "version": "v10.0.1",
       "sha": "20cfd1bf945f4377ade1205e4dbc17946fc9a30d"
     },
+    "github/gh-aw-actions/setup-cli@v0.88.7": {
+      "repo": "github/gh-aw-actions/setup-cli",
+      "version": "v0.88.7",
+      "sha": "5e508589e03a7757a7e05b26e834292f5445bfb6"
+    },
     "github/gh-aw-actions/setup@v0.88.7": {
       "repo": "github/gh-aw-actions/setup",
       "version": "v0.88.7",