Update Makefile for Min Instances with Cloud Run Target Deployment

[tbolis-at-mulesoft]

Hi Team,
here a possible addition I'd like you to comment/evaluate.

Update the Makefile to support a MIN_INSTANCES parameter in the deploy target. This will allow to control the minimum number of instances when deploying manually.

Thank you!

Update Makefile (make deploy)

Add logic to conditionally include the --min-instances flag if the MIN_INSTANCES variable is provided.

Usage Example:

make deploy MIN_INSTANCES=1

# ...
deploy:
	PROJECT_ID=$$(gcloud config get-value project) && \
	PROJECT_NUMBER=$$(gcloud projects describe $$PROJECT_ID --format="value(projectNumber)") && \
	gcloud beta run deploy my-a2a-erp-agent \
# ...
		$(if $(MIN_INSTANCES),--min-instances=$(MIN_INSTANCES)) \
# ...

[eliasecchig]

Thanks for the suggestion! This is intentionally not included - during development we want instances to scale to zero to avoid unnecessary costs. For production deployments where you need min instances, you can modify the Terraform configuration in deployment/terraform/ to set min_instance_count.