ci: pin GitHub Actions to commit SHAs (#505)

Supersedes #309 by @SurefireStudios, ported onto the current component layout with fixes from review.

Verified before merge: format, package boundaries, unit suite, build, and the browser tracking suite; a browser harness for the change where one applies; adversarial review applied.

Co-authored-by: SurefireStudios <[email protected]>

.github/workflows/ci.yml

@@ -26,12 +26,12 @@ jobs:
       GEV_REQUIRE_ALLOCATION_GATE: ${{ matrix.node == '24.14.0' && '1' || '0' }}
     steps:
       - name: Check out source
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           persist-credentials: false
 
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: ${{ matrix.node }}
           cache: npm
@@ -63,12 +63,12 @@ jobs:
       GEV_REQUIRE_ALLOCATION_GATE: '0'
     steps:
       - name: Check out source
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           persist-credentials: false
 
       - name: Use Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 24.14.0
           cache: npm

CHANGELOG.md

@@ -229,6 +229,10 @@ of current runtime behavior, see [`docs/CURRENT-STATE.md`](docs/CURRENT-STATE.md
   part-way through the picture, the upstream request is cancelled rather than
   left running, and neither case marks the camera degraded. Ordinary seeking is
   unaffected. Contributed by Maher-Reven (#253).
+- CI pins `actions/checkout` and `actions/setup-node` to the commits their
+  `v4.4.0` tags name, so a repointed tag cannot change what runs in CI. The
+  version stays in a trailing comment, and moving to a later release is a
+  deliberate edit. Contributed by SurefireStudios (#309).
 
 - Validate configured Google Places coordinates and text queries before rate
   limiting or upstream requests; preserve the keyless capability response.