fix(ci): pin third-party actions to full commit SHAs (#46)

fix(ci): pin third-party actions to full commit SHAs

The account's Actions policy requires a full-length SHA ref. A tag or
branch ref is refused at
startup — `startup_failure`, no jobs, "this workflow graph cannot be
shown" — so these workflows
could not run at all. This resolves each ref to the commit it currently
points at and records the
ref in a trailing comment, e.g. `actions/checkout@<sha> # v4`.

`dtolnay/rust-toolchain` takes its toolchain from the ref itself, so
those steps also gained an
explicit `with: toolchain:` input; without it, a SHA ref would silently
lose the channel.

No behaviour is intended to change beyond the pins.

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -39,11 +39,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v4.38.0
+        uses: github/codeql-action/init@b96794f015dfd88f77b49b1c93e0fa7110f94c63  # v4.38.0
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v4.38.0
+        uses: github/codeql-action/analyze@b96794f015dfd88f77b49b1c93e0fa7110f94c63  # v4.38.0
         with:
           category: "/language:${{ matrix.language }}"

.github/workflows/quality.yml

@@ -30,7 +30,7 @@ jobs:
         run: |
           find . -type f -perm /111 -name "*.sh" | head -10 || true
       - name: Check for secrets
-        uses: trufflesecurity/trufflehog@v3.97.4
+        uses: trufflesecurity/trufflehog@363923b901c911a9164f50b6c423f47c15372b1c  # v3.97.4
         with:
           path: ./
           base: ${{ github.event.pull_request.base.sha || github.event.before }}

.github/workflows/release.yml

@@ -136,7 +136,7 @@ jobs:
       #     name: release-artifacts
       #     path: artifacts/
       - name: Create GitHub Release
-        uses: softprops/action-gh-release@v3.0.3
+        uses: softprops/action-gh-release@efb35369e0ad2afab669f228072c1b0d510eae64  # v3.0.3
         with:
           body: ${{ needs.changelog.outputs.changelog }}
           draft: false

.github/workflows/sonarqube.yml

@@ -31,6 +31,6 @@ jobs:
         with:
           fetch-depth: 0   # full history for accurate new-code detection
       - name: SonarQube Scan
-        uses: SonarSource/sonarqube-scan-action@v8.2.1
+        uses: SonarSource/sonarqube-scan-action@22918119ff8e1ca75a623e15c8296b6ea4fbe28f  # v8.2.1
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}