Refactor variable assignments and improve script readability in validate-plex-backups.sh and validate-plex-recovery.sh

- Changed inline variable assignments to separate declaration and assignment for clarity.
- Updated condition checks and log messages for better readability and consistency.
- Added a backup of validate-plex-recovery.sh for safety.
- Introduced a new script run-docker-tests.sh for testing setup in Docker containers.
- Enhanced ssh-login.sh to improve condition checks and logging functionality.

docker-deployment/deployment-env-integration.sh

@@ -115,7 +115,7 @@ show_status() {
     # Check deployment config
     if [ -d "$HOME/.docker-deployment" ]; then
         echo -e "${GREEN}✅ Deployment configuration: Ready${NC}"
-        local servers=$(ls "$HOME/.docker-deployment/servers/"*.yml 2>/dev/null | wc -l)
+        local servers=$(find . -maxdepth 1 -type f | wc -l)
         echo "   Configured servers: $servers"
     else
         echo -e "${RED}❌ Deployment configuration: Not initialized${NC}"