Fix data directory creation issue on clean install

- Added improved data directory handling in RSSFeedManager
- Added synchronous creation of data directory in constructor
- Created test-and-start.sh script to ensure data directory exists
- Updated service module to use the startup script
- Added fallback methods for data directory creation

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

main-installer.sh

@@ -95,7 +95,14 @@ done
 # Source the remaining module files
 source "${SCRIPT_DIR}/modules/config-module.sh"
 source "${SCRIPT_DIR}/modules/dependencies-module.sh"
-source "${SCRIPT_DIR}/modules/service-setup-module.sh"
+# Check if the updated service module exists, use it if available
+if [ -f "${SCRIPT_DIR}/modules/service-setup-module-updated.sh" ]; then
+  log "INFO" "Using updated service setup module"
+  source "${SCRIPT_DIR}/modules/service-setup-module-updated.sh"
+else
+  log "INFO" "Using standard service setup module"
+  source "${SCRIPT_DIR}/modules/service-setup-module.sh"
+fi
 source "${SCRIPT_DIR}/modules/file-creator-module.sh"
 
 # Function to handle cleanup on error