fix: check only final responses in AllSucceeded to determine deployment success

The CLI was incorrectly reporting "some deployments failed" even when
deployments succeeded. This was because AllSucceeded() checked if every
response had StatusCompleted, but the Responses slice contains all
messages including intermediate ones like "started". Since started !=
completed, it returned false.

Now AllSucceeded() only examines final responses (using IsFinal()) and
checks that each host's final status is completed.

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

internal/cli/deploy.go

@@ -28,14 +28,32 @@ type DeployResult struct {
 	Errors    []error
 }
 
-// AllSucceeded returns true if all responses indicate success.
+// AllSucceeded returns true if all hosts' final responses indicate success.
 func (r *DeployResult) AllSucceeded() bool {
+	if len(r.Errors) > 0 {
+		return false
+	}
+
+	// Track the final status for each host
+	finalStatus := make(map[string]messages.Status)
 	for _, resp := range r.Responses {
-		if resp.Status != messages.StatusCompleted {
+		if resp.Status.IsFinal() {
+			finalStatus[resp.Hostname] = resp.Status
+		}
+	}
+
+	// Need at least one host with a final status
+	if len(finalStatus) == 0 {
+		return false
+	}
+
+	// All final statuses must be completed
+	for _, status := range finalStatus {
+		if status != messages.StatusCompleted {
 			return false
 		}
 	}
-	return len(r.Responses) > 0 && len(r.Errors) == 0
+	return true
 }
 
 // HostCount returns the number of unique hosts that responded.