feat: auto-detect container platform from GPU agent architecture

Added agent architecture information to share public API response
and use it to automatically set correct container platform when
creating studio environments.

Changes:
1. Backend API:
   - Added agent_arch field to PublicShareInfo response
   - Join worker and agent tables to get architecture info

2. Go Client:
   - Added AgentArch field to SharePublicInfo type
   - Auto-set platform based on GPU agent architecture
   - Prioritize agent arch over platform flag for library downloads
   - Log agent architecture in share link resolution

This ensures:
- ARM-based GPU workers (e.g., NVIDIA Jetson) get linux/arm64 containers
- x86_64 GPU workers get linux/amd64 containers
- Container architecture matches GPU endpoint architecture

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: andystime

cmd/ggo/studio/studio.go

@@ -256,12 +256,14 @@ func runCreate(cmd *cobra.Command, args []string) error {
 
 		// Append share code to connection URL for authentication
 		shareInfo.ConnectionURL = shareInfo.ConnectionURL + "+" + shortCode
-		klog.Infof("Resolved share link: worker_id=%s vendor=%s connection_url=%s",
-			shareInfo.WorkerID, shareInfo.HardwareVendor, shareInfo.ConnectionURL)
+		klog.Infof("Resolved share link: worker_id=%s vendor=%s arch=%s connection_url=%s",
+			shareInfo.WorkerID, shareInfo.HardwareVendor, shareInfo.AgentArch, shareInfo.ConnectionURL)
 
-		// Determine target arch from platform flag (default: amd64)
+		// Determine target arch from share info (preferred) or platform flag (fallback)
 		targetArch := "amd64"
-		if platform != "" {
+		if shareInfo.AgentArch != "" {
+			targetArch = shareInfo.AgentArch
+		} else if platform != "" {
 			if parts := strings.SplitN(platform, "/", 2); len(parts) == 2 {
 				targetArch = parts[1]
 			}
@@ -472,9 +474,17 @@ func buildCreateOptions(name string, shareInfo *api.SharePublicInfo) (*studio.Cr
 	}
 
 	// Default platform to linux/amd64 for studio containers
+	// If share info provides agent architecture, use it to set the correct platform
 	effectivePlatform := platform
 	if effectivePlatform == "" {
-		effectivePlatform = "linux/amd64"
+		if shareInfo != nil && shareInfo.AgentArch != "" {
+			// Use agent architecture from share info (e.g., "amd64", "arm64")
+			effectivePlatform = "linux/" + shareInfo.AgentArch
+			klog.V(2).Infof("Using platform from GPU agent: %s", effectivePlatform)
+		} else {
+			// Default to linux/amd64 for compatibility
+			effectivePlatform = "linux/amd64"
+		}
 	}
 
 	return &studio.CreateOptions{

internal/api/types.go

@@ -229,6 +229,7 @@ type SharePublicInfo struct {
 	WorkerID       string `json:"worker_id"`
 	HardwareVendor string `json:"hardware_vendor"`
 	ConnectionURL  string `json:"connection_url"`
+	AgentArch      string `json:"agent_arch,omitempty"` // Architecture of the agent (e.g., "amd64", "arm64")
 }
 
 // SystemMetrics represents system metrics for metrics report