Provider Actions

# Terraform Provider Actions Implementation Guide

## Overview

Terraform Actions enable imperative operations during the Terraform lifecycle. Actions are experimental features that allow performing provider operations at specific lifecycle events (before/after create, update, destroy).

**References:**
- [Terraform Plugin Framework](https://developer.hashicorp.com/terraform/plugin/framework)
- [Terraform Actions RFC](https://github.com/hashicorp/terraform/blob/main/docs/plugin-protocol/actions.md)

## File Structure

Actions follow the standard service package structure:

```
internal/service/<service>/
├── <action_name>_action.go       # Action implementation
├── <action_name>_action_test.go  # Action tests
└── service_package_gen.go        # Auto-generated service registration
```

Documentation structure:
```
website/docs/actions/
└── <service>_<action_name>.html.markdown  # User-facing documentation
```

Changelog entry:
```
.changelog/
└── <pr_number_or_description>.txt  # Release note entry
```

## Action Schema Definition

Actions use the Terraform Plugin Framework with a standard schema pattern:

```go
func (a *actionType) Schema(ctx context.Context, req action.SchemaRequest, resp *action.SchemaResponse) {
    resp.Schema = schema.Schema{
        Attributes: map[string]schema.Attribute{
            // Required configuration parameters
            "resource_id": schema.StringAttribute{
                Required:    true,
                Description: "ID of the resource to operate on",
            },
            // Optional parameters with defaults
            "timeout": schema.Int64Attribute{
                Optional:    true,
                Description: "Operation timeout in seconds",
                Default:     int64default.StaticInt64(1800),
                Computed:    true,
            },
        },
    }
}
```

### Common Schema Issues

**Pay special attention to the schema definition** - common issues after a first draft:

1. **Type Mismatches**
   - Using `types.String` instead of `fwtypes.String` in model structs
   - Using `types.StringType` instead of `fwtypes.StringType` in schema
   - Mixing framework types with plugin-framework types

2. **List/Map Element Types**
   ```go
   // WRONG - missing ElementType
   "items": schema.ListAttribute{
       Optional: true,
   }

   // CORRECT
   "items": schema.ListAttribute{
       Optional:    true,
       ElementType: fwtypes.StringType,
   }
   ```

3. **Computed vs Optional**
   - Attributes with defaults must be both `Optional: true` and `Computed: true`
   - Don't mark action inputs as `Computed` unless they have defaults

4. **Validator Imports**
   ```go
   // Ensure proper imports
   "github.com/hashicorp/terraform-plugin-framework-validators/int64validator"
   "github.com/hashicorp/terraform-plugin-framework-validators/stringvalidator"
   ```

5. **Region/Provider Attribute**
   - Use framework-provided region handling when available
   - Don't manually define provider-specific config in schema if framework handles it

6. **Nested Attributes**
   - Use appropriate nested object types for complex structures
   - Ensure nested types are properly defined

### Schema Validation Checklist

Before submitting, verify:
- [ ] All attributes have descriptions
- [ ] List/Map attributes have ElementType defined
- [ ] Validators are imported and applied correctly
- [ ] Model struct uses correct framework types
- [ ] Optional attributes with defaults are marked Computed
- [ ] Code compiles without type errors
- [ ] Run `go build` to catch type mismatches

## Action Invoke Method

The Invoke method contains the action logic:

```go
func (a *actionType) Invoke(ctx context.Context, re