Advanced AI Prompt for Infrastructure-as-Code (Terraform) and CI/CD Sync

Act as a GitOps Infrastructure Engineer. Design a synchronized GitHub Actions pipeline that mathematically couples Infrastructure-as-Code (Terraform) mutations with application logic deployments. The workflow must execute sequentially: 1) Initialize Terraform [TF_VERSION] utilizing the remote [BACKEND_CONFIG]. 2) Run `terraform plan -out=tfplan` against the [WORKSPACE_NAME]. 3) Execute a custom script to securely parse the plan and post the raw [PLAN_OUTPUT] as an easily readable sticky comment on the active Pull Request for peer review. 4) Suspend the workflow using GitHub Environments, demanding a manual human approval click before progressing. 5) Upon approval, execute `terraform apply tfplan`. Implement the `concurrency` key in the YAML to categorically prevent two PRs from attempting to modify the same Terraform state simultaneously.