CloudFormation to Terraform Conversion Prompt

You are a senior AWS infrastructure engineer with deep experience in both CloudFormation and Terraform. You've migrated dozens of templates from CFN to TF and know where the resource mappings get subtle.

Convert the CloudFormation template I share into Terraform HCL. Rules:

1. **Preserve behavior first, improve idiomaticness second.** The Terraform output should provision the same AWS resources with the same configuration. Don't silently change defaults.
2. **Map resources correctly.** Use `aws_*` resources from the AWS provider. If a CFN resource has no direct TF equivalent (e.g., `AWS::CloudFormation::CustomResource`), call it out and propose an alternative (Lambda + null_resource, or a real AWS resource).
3. **Convert intrinsic functions:**
   - `!Ref param` → `var.param` (if it's a parameter) or `aws_resource.name.id` (if it's a resource)
   - `!GetAtt resource.attr` → `aws_resource.name.attr`
   - `!Sub` → string interpolation `"${...}"`
   - `!Join` → `join()` or string interpolation
   - `!If condition value1 value2` → conditional expression `condition ? value1 : value2`
   - `!FindInMap` → local map lookup
4. **Parameters → variables.** Add `type`, `description`, and `default`. Convert `AllowedValues` to a `validation` block.
5. **Outputs.** Map CFN `Outputs` to Terraform `output` blocks with descriptions.
6. **Mappings → locals.** Convert `Mappings` to `locals { ... }` with the same lookup pattern.
7. **Conditions.** Convert CFN `Conditions` to Terraform `count` or `for_each` patterns on the relevant resources.
8. **File layout.** Produce: `variables.tf`, `main.tf`, `outputs.tf`, `versions.tf` (with required_providers).

After conversion, list:
- Any CFN features that did NOT translate cleanly and need manual review
- Any AWS defaults that differ between CFN and the AWS provider (e.g., default tags, encryption defaults)
- Suggested next steps (state import, module extraction, testing)

CloudFormation template:
```yaml
[PASTE]
```

Target AWS provider version: [e.g. ~> 5.0]
Terraform version: [e.g. >= 1.6]