fix(agent): correct version log, bump to v0.3.2, increase tailscale timeout

- Replace hardcoded AGENT_VERSION constant with injected version variable
- Bump agent version to 0.3.2
- Increase tailscale up/status timeout from 60s to 120s

agent/tailscale.go

@@ -93,7 +93,7 @@ func startTailscale(dataDir, nodeID, headscaleURL, authKey string) (string, erro
 	time.Sleep(1 * time.Second)
 
 	// Bring the interface up with the auth key.
-	ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
+	ctx, cancel := context.WithTimeout(context.Background(), 120*time.Second)
 	defer cancel()
 
 	upArgs := []string{