Update go sdk ver (#347)

* chore: change link to docs.

* docs: add Go SDK documentation

* up rwp shop.

* feat: add private link handling.

* docs: update Go SDK documentation for v2.6.1

- Add v2.6.1 and v2.5.3 to version table
- Update type names: remove Dto suffix (CreateUserRequestDto → CreateUserRequest)
- Add pagination example with PaginationHelper
- Update controllers list: 14 → 26 controllers
- Add new features: OpenTelemetry, RequestOption, Editors
- Fix error handling example to match actual Res interfaces

docs/sdk/go-sdk.md

@@ -14,11 +14,14 @@ Remnawave Go SDK is a library for convenient interaction with the RestAPI.
 
 ✨ Key Features
 
-- **Generated with ogen**: Zero-reflection JSON decoder for high throughput
+- **Generated with [ogen](https://github.com/ogen-go/ogen) v1.19.0**: Zero-reflection JSON decoder for high throughput
 - **Type-safe**: Compile-time validation against OpenAPI 3.0 spec
 - **Controller-based design**: Organized sub-clients for clean API access
 - **Simplified signatures**: No verbose Params structs for simple operations
 - **Context support**: First-class `context.Context` support
+- **OpenTelemetry**: Built-in tracing instrumentation
+- **Request options**: Per-request customization via `...RequestOption`
+- **Editors**: Request/response middleware support
 
 ## Installation
 
@@ -32,6 +35,8 @@ Always pick and pin the correct version of the SDK to match the version of the R
 
 | SDK Version | Remnawave Panel Version |
 | ----------- | ----------------------- |
+| v2.6.1      | 2.6.1                   |
+| v2.5.3      | 2.5.3                   |
 | v2.3.0-6    | 2.3.0                   |
 | v2.2.6-3    | 2.2.6                   |
 
@@ -109,7 +114,7 @@ func main() {
     client := remapi.NewClientExt(baseClient)
 
     // Create user
-    createResp, err := client.Users().CreateUser(ctx, &remapi.CreateUserRequestDto{
+    createResp, err := client.Users().CreateUser(ctx, &remapi.CreateUserRequest{
         Username: "john_doe",
     })
     if err != nil {
@@ -117,24 +122,24 @@ func main() {
     }
 
     user := createResp.(*remapi.UserResponse).Response
-    fmt.Printf("Created user: %s (UUID: %s)\n", user.Username, user.Uuid)
+    fmt.Printf("Created user: %s (UUID: %s)\n", user.Username, user.UUID)
 
     // Disable user
-    _, err = client.Users().DisableUser(ctx, user.Uuid.String())
+    _, err = client.Users().DisableUser(ctx, user.UUID.String())
     if err != nil {
         log.Fatal(err)
     }
     fmt.Println("User disabled")
 
     // Enable user
-    _, err = client.Users().EnableUser(ctx, user.Uuid.String())
+    _, err = client.Users().EnableUser(ctx, user.UUID.String())
     if err != nil {
         log.Fatal(err)
     }
     fmt.Println("User enabled")
 
     // Delete user
-    _, err = client.Users().DeleteUser(ctx, user.Uuid.String())
+    _, err = client.Users().DeleteUser(ctx, user.UUID.String())
     if err != nil {
         log.Fatal(err)
     }
@@ -177,13 +182,13 @@ func main() {
     fmt.Printf("Total nodes: %d\n", len(nodes))
 
     for _, node := range nodes {
-        fmt.Printf("  - %s (%s): connected=%v\n", 
+        fmt.Printf("  - %s (%s): connected=%v\n",
             node.Name, node.Address, node.IsConnected)
     }
 
     // Get single node
     if len(nodes) > 0 {
-        nodeResp, _ := client.Nodes().GetOneNode(ctx, nodes[0].Uuid.String())
+        nodeResp, _ := client.Nodes().GetOneNode(ctx, nodes[0].UUID.String())
         node := nodeResp.(*remapi.NodeResponse).Response
         fmt.Printf("\nNode details: %s\n", node.Name)
     }
@@ -192,6 +197,57 @@ func main() {
 
 </details>
 
+<details>
+<summary>Pagination</summary>
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+    "log"
+
+    remapi "github.com/Jolymmiles/remnawave-api-go/v2/api"
+)
+
+func main() {
+    ctx := context.Background()
+
+    baseClient, _ := remapi.NewClient(
+        "https://your-panel.example.com",
+        remapi.StaticToken{Token: "YOUR_API_TOKEN"},
+    )
+    client := remapi.NewClientExt(baseClient)
+
+    // Use PaginationHelper for iterating through pages
+    pager := remapi.NewPaginationHelper(50) // 50 items per page
+
+    for pager.HasMore {
+        resp, err := client.Users().GetAllUsers(ctx,
+            pager.Limit,  // size
+            pager.Offset, // start
+        )
+        if err != nil {
+            log.Fatal(err)
+        }
+
+        users := resp.(*remapi.GetAllUsersResponse)
+        for _, user := range users.Response.Users {
+            fmt.Printf("User: %s (UUID: %s)\n", user.Username, user.UUID)
+        }
+
+        // Advance to next page
+        pager.SetTotal(int(users.Response.Total))
+        pager.NextPage()
+    }
+
+    fmt.Printf("Total users: %d\n", *pager.Total)
+}
+```
+
+</details>
+
 <details>
 <summary>Error handling</summary>
 
@@ -220,23 +276,21 @@ func main() {
         log.Fatal("Network error:", err)
     }
 
+    // Available error types depend on the endpoint — check the generated
+    // Res interface (e.g. UsersGetUserByUuidRes) for the full list.
     switch e := resp.(type) {
+    case *remapi.UserResponse:
+        fmt.Printf("User found: %s\n", e.Response.Username)
     case *remapi.BadRequestError:
         fmt.Println("Validation errors:")
         for _, ve := range e.Errors {
-            fmt.Printf("  - %s: %s (path: %v)\n", 
+            fmt.Printf("  - %s: %s (path: %v)\n",
                 ve.Code, ve.Message, ve.Path)
         }
-    case *remapi.UnauthorizedError:
-        fmt.Println("Invalid or expired token")
-    case *remapi.ForbiddenError:
-        fmt.Println("Access denied")
     case *remapi.NotFoundError:
         fmt.Println("Resource not found")
     case *remapi.InternalServerError:
         fmt.Printf("Server error: %s\n", e.Message.Value)
-    case *remapi.UserResponse:
-        fmt.Printf("User found: %s\n", e.Response.Username)
     }
 }
 ```
@@ -247,20 +301,32 @@ func main() {
 
 | Controller | Description |
 |------------|-------------|
-| `client.Users()` | User management |
-| `client.UsersBulkActions()` | Bulk user operations |
-| `client.Nodes()` | Node management |
+| `client.ApiTokens()` | API token management |
+| `client.Auth()` | Authentication |
+| `client.BandwidthStatsNodes()` | Node bandwidth statistics |
+| `client.BandwidthStatsUsers()` | User bandwidth statistics |
+| `client.ConfigProfile()` | Config profiles |
+| `client.ExternalSquad()` | External squads |
 | `client.Hosts()` | Host management |
 | `client.HostsBulkActions()` | Bulk host operations |
-| `client.Auth()` | Authentication |
-| `client.Subscription()` | Subscription management |
-| `client.SubscriptionSettings()` | Subscription settings |
-| `client.SubscriptionTemplate()` | Templates |
-| `client.ConfigProfile()` | Config profiles |
+| `client.HwidUserDevices()` | HWID devices |
+| `client.InfraBilling()` | Infrastructure billing |
 | `client.InternalSquad()` | Internal squads |
-| `client.ExternalSquad()` | External squads |
+| `client.Keygen()` | Key generation |
+| `client.Nodes()` | Node management |
+| `client.NodesUsageHistory()` | Node usage history |
+| `client.Passkey()` | Passkey authentication |
+| `client.RemnawaveSettings()` | Panel settings |
+| `client.Snippets()` | Code snippets |
+| `client.Subscription()` | Subscription management |
+| `client.SubscriptionPageConfig()` | Subscription page config |
+| `client.SubscriptionSettings()` | Subscription settings |
+| `client.SubscriptionTemplate()` | Subscription templates |
+| `client.Subscriptions()` | Multiple subscriptions |
 | `client.System()` | System info |
-| `client.ApiTokens()` | API tokens |
+| `client.UserSubscriptionRequestHistory()` | Request history |
+| `client.Users()` | User management |
+| `client.UsersBulkActions()` | Bulk user operations |
 
 ## Error Types