ci(codeql): bump codeql-action init/analyze to v4 (#168)

The v3 actions still work but emit a Node 20 deprecation warning on
every run; v4 runs on Node 24 (matches GitHub Actions runner default
starting June 2026). Pure version bump — no behavior change.

Author: Lykhoyda

.github/workflows/codeql.yml

@@ -57,7 +57,7 @@ jobs:
           java-version: '17'
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
+        uses: github/codeql-action/init@v4
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
@@ -89,6 +89,6 @@ jobs:
             ONLY_ACTIVE_ARCH=YES
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v3
+        uses: github/codeql-action/analyze@v4
         with:
           category: "/language:${{ matrix.language }}"