Modify agent logs to be less verbose by truncating certain values

[mye956]

Summary

This PR aims to truncate certain values that are logged within the ECS agent application. It also cleans up unnecessary log values that aren't helpful.

Implementation details

• Added new utility function to truncate strings up to a specific length

Testing

Manual testing via a custom ECS Agent container image. Launched a simple nginx webapp task. ECS Agent logs:

level=info time=2026-04-23T21:50:47Z msg="Successfully got ECS instance credentials from provider: EC2RoleProvider"     
  level=info time=2026-04-23T21:50:48Z msg="Establishing a Websocket connection"                                          
  url="https://ecs-a-12.us-west-2.amazonaws.com/ws?agentHash=fbc95536&agentVersion=1.103.0&clusterArn=default&containerIns
  tanceArn=arn%3Aaws%3Aecs%3Aus-west-2%3A<ACCOUNT_ID>%3Acontainer-instance%2Fdefault%2F<CONTAINER_INSTANCE_ID>&dockerVersi
  on=DockerVersion%3A+25.0.14&protocolVersion=2&sendCredentials=true&seqNum=1"                                            
  level=info time=2026-04-23T21:50:48Z msg="Websocket connection established." ExpectedDisconnectTime="2026-04-23         
  22:20:48"                                                                                                               
  URL="https://ecs-a-12.us-west-2.amazonaws.com/ws?agentHash=fbc95536&agentVersion=1.103.0&clusterArn=default&containerIns
  tanceArn=arn%3Aaws%3Aecs%3Aus-west-2%3A<ACCOUNT_ID>%3Acontainer-instance%2Fdefault%2F<CONTAINER_INSTANCE_ID>&dockerVersi
  on=DockerVersion%3A+25.0.14&protocolVersion=2&sendCredentials=true&seqNum=1"                                            
  ConnectTime="2026-04-23 21:50:48" maxConnectionDuration=30m50.572348903s                                                
  level=info time=2026-04-23T21:51:23Z msg="Found application credentials for task" roleType="TaskApplication"            
  credentialsID="767f1b27-REDACTED" taskARN="arn:aws:ecs:us-west-2:<ACCOUNT_ID>:task/default/<TASK_ID>" taskVersion="1"   
  roleARN="arn:aws:iam::<ACCOUNT_ID>:role/ecsTaskExecutionRole"                                                           
  level=info time=2026-04-23T21:51:23Z msg="Found execution credentials for task"                                         
  taskARN="arn:aws:ecs:us-west-2:<ACCOUNT_ID>:task/default/<TASK_ID>" taskVersion="1"                                     
  roleARN="arn:aws:iam::<ACCOUNT_ID>:role/TaskExecutionRoleARN" roleType="TaskExecution" credentialsID="8f42fc44-REDACTED"
  level=info time=2026-04-23T21:51:23Z msg="Found application credentials for task"                                       
  taskARN="arn:aws:ecs:us-west-2:<ACCOUNT_ID>:task/default/<TASK_ID>" taskVersion="1"                                     
  roleARN="arn:aws:iam::<ACCOUNT_ID>:role/ecsTaskExecutionRole" roleType="TaskApplication"                                
  credentialsID="f7b3db46-REDACTED"                                                                                       
  level=info time=2026-04-23T21:51:23Z msg="Found execution credentials for task"                                         
  taskARN="arn:aws:ecs:us-west-2:<ACCOUNT_ID>:task/default/<TASK_ID>" taskVersion="1"                                     
  roleARN="arn:aws:iam::<ACCOUNT_ID>:role/TaskExecutionRoleARN" roleType="TaskExecution" credentialsID="b35d70f2-REDACTED"

New tests cover the changes: yes

Description for the changelog

enhancement: Truncate log values to make agent logs less verbose

Additional Information

Does this PR include breaking model changes? If so, Have you added transformation functions?

Does this PR include the addition of new environment variables in the README?

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[sparrc]

It also cleans up unnecessary log values that aren't helpful.

It doesnt do this does it?

[mye956]

It also cleans up unnecessary log values that aren't helpful.

It doesnt do this does it?

It does if you take a look at awslogsCredsEndpointOpt: credentialsEndpointRelativeURI, in agent/api/task/task.go