Add logs endpoint for swaps - logs.zebra-swaps.zsa-test.net

[seniakalma]

• Add a dedicated swaps logs endpoint stack under lambda-swaps.
• Provision API Gateway, Lambda, IAM role, and log-read/ECR policies for watch-zebra-swaps-logs.
• Configure the swaps logs Lambda to read /dev/ecs/zebra-swaps-task and expose it via logs.zebra-swaps.zsa-test.net.
• Allow the CI/CD user to update both the regular logs Lambda and the swaps logs Lambda.

[PaulLaux]

Looks good with one comment:

LOG_GROUP_NAME env var

• New lambda sets LOG_GROUP_NAME = "/dev/ecs/zebra-swaps-task"
• Existing watch-zebra-logs lambda (lambda/lambda/terragrunt.hcl) does not set this env var.

Looks like a potential conflict in the future, no?

Consider to set LOG_GROUP_NAME = "/dev/ecs/zebra-task" explicitly on the original, so no lambda relies on a default.