refactor: Apply cache fixes directly to existing runner configs

- Update all runner configuration files with cache networking fixes:
  - config_docker.yaml
  - config_heavy.yaml
  - config_light.yaml
  - config_security.yaml
- Remove separate config_cache_fixed.yaml file
- Update troubleshooting scripts to use updated configs
- Update documentation to reference existing config files

All runner configs now have:
- Fixed cache host: host.docker.internal
- Fixed cache port: 44029
- Host networking for better container connectivity

This provides a cleaner approach by updating existing configs
instead of maintaining a separate fixed configuration file.

runners/fix-cache-issues.ps1

@@ -92,12 +92,15 @@ function Restart-CacheService {
     Get-Process -Name "act_runner" -ErrorAction SilentlyContinue | Stop-Process -Force
     Start-Sleep -Seconds 2
     
-    # Start with fixed configuration
-    if (Test-Path "config_cache_fixed.yaml") {
-        Write-Host "✅ Using fixed configuration" -ForegroundColor Green
-        Start-Process -FilePath ".\act_runner.exe" -ArgumentList "daemon", "--config", "config_cache_fixed.yaml" -WindowStyle Hidden
+    # Start with updated configuration
+    if (Test-Path "config_docker.yaml") {
+        Write-Host "✅ Using updated Docker configuration" -ForegroundColor Green
+        Start-Process -FilePath ".\act_runner.exe" -ArgumentList "daemon", "--config", "config_docker.yaml" -WindowStyle Hidden
+    } elseif (Test-Path "config_heavy.yaml") {
+        Write-Host "✅ Using updated heavy configuration" -ForegroundColor Green
+        Start-Process -FilePath ".\act_runner.exe" -ArgumentList "daemon", "--config", "config_heavy.yaml" -WindowStyle Hidden
     } else {
-        Write-Host "⚠️  Fixed configuration not found, using default" -ForegroundColor Yellow
+        Write-Host "⚠️  Updated configuration not found, using default" -ForegroundColor Yellow
         Start-Process -FilePath ".\act_runner.exe" -ArgumentList "daemon" -WindowStyle Hidden
     }