feat(fuzz): add cache cleaning step to prevent timeouts

Author: mrz1836

.github/workflows/fortress-test-fuzz.yml

@@ -116,6 +116,15 @@ jobs:
           echo "fuzz-start=$(date +%s)" >> $GITHUB_OUTPUT
           echo "🕒 Fuzz test timer started at: $(date -u +%Y-%m-%dT%H:%M:%SZ)"
 
+      # --------------------------------------------------------------------
+      # Clean fuzz cache to prevent accumulated corpus timeouts
+      # --------------------------------------------------------------------
+      - name: 🧹 Clean fuzz cache
+        run: |
+          echo "🧹 Cleaning accumulated fuzz corpus to prevent timeout..."
+          go clean -fuzzcache
+          echo "✅ Fuzz cache cleaned"
+
       # --------------------------------------------------------------------
       # Run fuzz tests
       # --------------------------------------------------------------------