Fix CI pipeline docker history command failure

🔧 Pipeline Fix:
• Added error handling for docker history command that was failing
• Exit status 141 (SIGPIPE) from head command causing pipeline failure
• Build was actually successful, just diagnostic command failing

✅ Changes:
• Wrapped docker history in proper error handling
• Pipeline will continue even if history display fails
• Build success is preserved regardless of diagnostic command issues

🎯 Root Cause:
• Permission issue with Docker config file loading
• SIGPIPE when head command terminates docker history output
• Non-critical diagnostic causing critical failure

.gitea/workflows/ci.yml

@@ -101,9 +101,13 @@ jobs:
         
         echo "Docker image built and tagged successfully"
         
-        # Show layer info for debugging
+        # Show layer info for debugging (with error handling)
         echo "=== Image layer history ==="
-        docker history nfoguard:latest --format "table {{.CreatedBy}}\t{{.Size}}" | head -5
+        if docker history nfoguard:latest --format "table {{.CreatedBy}}\t{{.Size}}" 2>/dev/null; then
+          echo "✅ Image history displayed successfully"
+        else
+          echo "⚠️ Could not display image history (permissions issue, but build succeeded)"
+        fi
 
     - name: Login and Push to Gitea registry (local IP only)
       run: |