feat: identify requests as the Terraform provider, not the Go SDK

[ChiragAgg5k]

Description

The provider only overrode User-Agent. Every other SDK identity header still reported the Go SDK, so Appwrite attributed Terraform traffic to it. The server reads x-sdk-name to record which SDKs used an API key, and x-sdk-language to classify deployments.

Requests now send:

Header	Before	After
user-agent	terraform-provider-appwrite/<ver>	Terraform/<tf ver> terraform-provider-appwrite/<ver> AppwriteGoSDK/v7.5.0 (<os>; <arch>) + TF_APPEND_USER_AGENT
x-sdk-name	Go	Terraform
x-sdk-platform	server	server
x-sdk-language	go	terraform
x-sdk-version	v7.5.0	provider version

• WithUserAgent is replaced by common.WithIdentity(providerVersion, terraformVersion), fed req.TerraformVersion from Configure. The Terraform token is omitted when core doesn't report a version. The SDK token is read from the header the SDK already set, so it stays accurate across SDK bumps.
• Removed the unused HTTPConfig.UserAgent field and a stale comment on AppendedUserAgent.

Server-side follow-up: API keys only record x-sdk-name values that match a server SDK in app/config/sdks.php, so Terraform won't appear in a key's sdks list until the server accepts it. Separately, app/controllers/shared/api.php compares the header case-sensitively against a lowercase list, so standard keys never record any SDK today.

Type of Change

• Bug fix
• New resource or data source
• Enhancement to existing resource
• Documentation
• Other

Checklist

• make lint passes
• make test passes
• make docs has been run and changes committed (no schema or docs changes)
• Acceptance tests added/updated (for resource changes)
• Examples added/updated (for new resources/data sources)

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Changes how the provider identifies itself to the API.

The PR appears safe to merge; no new actionable issue was established.

Summary

The PR identifies Appwrite requests as Terraform provider traffic in SDK headers and the User-Agent, then updates the tests to inspect headers received by a local HTTP server.

• Both project and organization client options receive the Terraform and provider versions.
• The identity tests now check outgoing requests rather than client configuration.

_{Reviews (2) · Last reviewed commit: "test: assert identity headers on an outb..."}