Schema Validators and Plan Modifiers

Modify the schema of the existing example resource in the HashiCorp scaffold to add validators and plan modifiers.

Setup

git clone https://github.com/hashicorp/terraform-provider-scaffolding-framework.git .
git checkout 3f9b7d20f49724d61ffaa28f5812c347b6a3e4a1
go mod tidy

Task

Update the example_resource in the scaffold to add the following attributes with appropriate validators and plan modifiers:

1. Add a status attribute (Optional, String) that only accepts values: "active", "inactive", "archived". Use a string validator.

2. Add a priority attribute (Optional, Int64) that must be between 1 and 10 inclusive. Use an int64 validator.

3. Add a created_at attribute (Computed, String) that is stable after creation. Use the appropriate plan modifier so it is preserved across updates.

4. Add an updated_at attribute (Computed, String) that changes on every update. Do NOT use UseStateForUnknown on this attribute.

5. Add a slug attribute (Required, String) that forces resource replacement if changed. Use the appropriate plan modifier.

6. The existing id attribute should use UseStateForUnknown since it is a stable computed value.

Ensure the project builds with go build ./....