fix: align health endpoint with backend

internal/client/client.go

@@ -93,7 +93,7 @@ func (c *Client) Delete(path string) ([]byte, error) {
 
 // Health checks the API health endpoint and returns the response.
 func (c *Client) Health() (map[string]interface{}, error) {
-	data, err := c.Get("/api/health/")
+	data, err := c.Get("/health")
 	if err != nil {
 		return nil, err
 	}