fix: add missing ecs:TagResource permission for ECS tasks (#657)

When using serverless-step-functions to deploy ECS tasks with tags, the auto-generated
IAM policies were missing the ecs:TagResource permission. This caused Step Functions
executions to fail with an AccessDeniedException when attempting to tag ECS tasks.

This commit adds the ecs:TagResource permission to the getEcsPermissions function,
allowing ECS tasks to be properly tagged during execution.

Fixes #656

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: renanwilliam

lib/deploy/stepFunctions/compileIamRole.js

@@ -176,7 +176,7 @@ function getGluePermissions() {
 
 function getEcsPermissions() {
   return [{
-    action: 'ecs:RunTask,ecs:StopTask,ecs:DescribeTasks,iam:PassRole',
+    action: 'ecs:RunTask,ecs:StopTask,ecs:DescribeTasks,ecs:TagResource,iam:PassRole',
     resource: '*',
   }, {
     action: 'events:PutTargets,events:PutRule,events:DescribeRule',

lib/deploy/stepFunctions/compileIamRole.test.js

@@ -1651,7 +1651,7 @@ describe('#compileIamRole', () => {
       .provider.compiledCloudFormationTemplate.Resources.StateMachine1Role
       .Properties.Policies[0].PolicyDocument.Statement;
 
-    const ecsPermissions = statements.filter(s => _.isEqual(s.Action, ['ecs:RunTask', 'ecs:StopTask', 'ecs:DescribeTasks', 'iam:PassRole']));
+    const ecsPermissions = statements.filter(s => _.isEqual(s.Action, ['ecs:RunTask', 'ecs:StopTask', 'ecs:DescribeTasks', 'ecs:TagResource', 'iam:PassRole']));
     expect(ecsPermissions).to.have.lengthOf(1);
     expect(ecsPermissions[0].Resource).to.equal('*');
 
@@ -2694,7 +2694,7 @@ describe('#compileIamRole', () => {
     const expectation = (policy, lambdaArns, sns, sqsArn) => {
       const statements = policy.PolicyDocument.Statement;
 
-      const ecsPermissions = statements.filter(s => _.isEqual(s.Action, ['ecs:RunTask', 'ecs:StopTask', 'ecs:DescribeTasks', 'iam:PassRole']));
+      const ecsPermissions = statements.filter(s => _.isEqual(s.Action, ['ecs:RunTask', 'ecs:StopTask', 'ecs:DescribeTasks', 'ecs:TagResource', 'iam:PassRole']));
       expect(ecsPermissions).to.have.lengthOf(1);
       expect(ecsPermissions[0].Resource).to.equal('*');