api: expose host.repo_status in /api/hosts JSON

The dashboard renders init_running / init_failed / ready state
based on host.repo_status, but the JSON endpoint dropped the
field on its way out. The e2e test couldn't poll for repo
readiness; reflect the same projection the UI uses.

internal/server/http/hosts.go

@@ -25,6 +25,7 @@ type hostView struct {
 	CurrentJobID     *string  `json:"current_job_id,omitempty"`
 	LastBackupAt     *string  `json:"last_backup_at,omitempty"`
 	LastBackupStatus *string  `json:"last_backup_status,omitempty"`
+	RepoStatus       string   `json:"repo_status,omitempty"`
 	RepoSizeBytes    int64    `json:"repo_size_bytes"`
 	SnapshotCount    int      `json:"snapshot_count"`
 	OpenAlertCount   int      `json:"open_alert_count"`
@@ -85,6 +86,7 @@ func hostToView(h store.Host) hostView {
 		Tags:             h.Tags,
 		CurrentJobID:     h.CurrentJobID,
 		LastBackupStatus: h.LastBackupStatus,
+		RepoStatus:       h.RepoStatus,
 		RepoSizeBytes:    h.RepoSizeBytes,
 		SnapshotCount:    h.SnapshotCount,
 		OpenAlertCount:   h.OpenAlertCount,