v7.0.0

fix: Scope plan storage AWS credentials to prevent Atmos auth interference @milldr (#93)

## What

Use output-credentials: true mode for plan storage credential configuration and pass credentials explicitly via step-level env: vars to the plan storage steps.

Why

When using Atmos auth for Terraform operations (instead of the terraform-apply-role setting), the AWS credentials configured for plan storage (S3/DynamoDB access) were persisting in environment variables and taking precedence over Atmos' authentication mechanism.

This caused authentication failures when:

1. terraform-apply-role was not configured in gitops settings
2. Atmos auth was expected to handle role assumption for the target account
3. Plan storage credentials remained in AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN

Changes

• Add output-credentials: true to plan storage credential configuration step
• Add step id plan-storage-credentials for referencing credential outputs
• Pass AWS credentials explicitly via env: to "Retrieve Plan" and "Retrieve Lockfile" steps
• Rename second credential configuration step to "Configure Apply AWS Credentials" for clarity

Update readme with plan-diff notes @goruha (#92)

## what * Update readme with plan-diff notes

why

• Document plan-diff mode behaviour and non-deterministic plan diff limitations

references

• https://linear.app/cloudposse/issue/DEV-3762/add-skip-plandiff-option-improve-plan-diff-reliability

Add conditional for Atmos installation step @jamengual (#90)

This pull request makes a small update to the workflow configuration in `action.yml`. The change adds a conditional check to only install Atmos if the `atmos-version` input is provided.

🚀 Enhancements

fix: correct README.yaml indentation and test atmos configs @milldr (#96)

## What - Fix README.yaml blockquote indentation that caused YAML parsing errors - Fix test atmos.yaml base_path by removing `./` prefix

Why

• README.yaml had improperly indented blockquote continuation lines causing the release workflow to fail
• Test atmos configs had ./tests/... instead of tests/... which caused test failures

References

• Similar fix in plan action: cloudposse/github-action-atmos-terraform-plan#124
• Failed release: https://github.com/cloudposse/github-action-atmos-terraform-apply/actions/runs/20174357833