Fixed an issue where deployment log messages were incorrect for ECS native Blue/Green deployments

Expected behavior

When using ECS Blue/Green deployment strategy, ecspresso should log "deployment by ECS blue/green" to clearly indicate the deployment method being used.

Actual behavior

• All deployments were logged as "deployment by ECS rolling update" regardless of the actual deployment strategy
• This was misleading when Blue/Green deployment was actually being used

Solution

Added conditional logic to check DeploymentConfiguration.Strategy and log the appropriate message:

• When Strategy == types.DeploymentStrategyBlueGreen: logs "deployment by ECS blue/green"
• Otherwise: logs "deployment by ECS rolling update"