feat: add context support to DirectlyGetModels method

## CHANGES

- Add context parameter to DirectlyGetModels method signature
- Add nil context check with Background fallback
- Extract magic number 500 into errorResponseLimit constant
- Update DirectlyGetModels call to pass context.Background
- Import context package in providers_config.go file

internal/plugins/ai/openai_compatible/direct_models_call.go

@@ -15,10 +15,15 @@ type Model struct {
 	ID string `json:"id"`
 }
 
+const errorResponseLimit = 500
+
 // DirectlyGetModels is used to fetch models directly from the API
 // when the standard OpenAI SDK method fails due to a nonstandard format.
 // This is useful for providers like Together that return a direct array of models.
-func (c *Client) DirectlyGetModels() ([]string, error) {
+func (c *Client) DirectlyGetModels(ctx context.Context) ([]string, error) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
 	baseURL := c.ApiBaseURL.Value
 	if baseURL == "" {
 		return nil, fmt.Errorf("API base URL not configured")
@@ -30,7 +35,7 @@ func (c *Client) DirectlyGetModels() ([]string, error) {
 		return nil, fmt.Errorf("failed to create models URL: %w", err)
 	}
 
-	req, err := http.NewRequestWithContext(context.Background(), "GET", fullURL, nil)
+	req, err := http.NewRequestWithContext(ctx, "GET", fullURL, nil)
 	if err != nil {
 		return nil, err
 	} else {
@@ -51,8 +56,8 @@ func (c *Client) DirectlyGetModels() ([]string, error) {
 		// Read the response body for debugging
 		bodyBytes, _ := io.ReadAll(resp.Body)
 		bodyString := string(bodyBytes)
-		if len(bodyString) > 500 { // Truncate if too large
-			bodyString = bodyString[:500] + "..."
+		if len(bodyString) > errorResponseLimit { // Truncate if too large
+			bodyString = bodyString[:errorResponseLimit] + "..."
 		}
 		return nil, fmt.Errorf("unexpected status code: %d from provider %s, response body: %s",
 			resp.StatusCode, c.GetName(), bodyString)

internal/plugins/ai/openai_compatible/providers_config.go

@@ -1,6 +1,7 @@
 package openai_compatible
 
 import (
+	"context"
 	"os"
 	"strings"
 
@@ -39,7 +40,7 @@ func (c *Client) ListModels() ([]string, error) {
 		return models, nil
 	}
 
-	return c.DirectlyGetModels()
+	return c.DirectlyGetModels(context.Background())
 }
 
 // ProviderMap is a map of provider name to ProviderConfig for O(1) lookup