feat(tasks): implement atomic claims and leases

backend-api/internal/repository/sqlite/auth_repository.go

@@ -476,13 +476,16 @@ func getDeviceByID(
 	var androidVersion sql.NullString
 	var pddVersion sql.NullString
 	var lastSeenAt sql.NullString
+	var readinessAt sql.NullString
 	var createdAt string
 	var updatedAt string
 	err := queryer.QueryRowContext(
 		ctx,
 		`SELECT
 			id, name, token_hash, bound_user_id, app_version, android_version,
-			pdd_version, last_seen_at, is_enabled, created_at, updated_at
+			pdd_version, last_seen_at, readiness_reported_at,
+			accessibility_enabled, pdd_installed, is_enabled,
+			created_at, updated_at
 		FROM devices
 		WHERE id = ?`,
 		deviceID,
@@ -495,6 +498,9 @@ func getDeviceByID(
 		&androidVersion,
 		&pddVersion,
 		&lastSeenAt,
+		&readinessAt,
+		&device.AccessibilityEnabled,
+		&device.PDDInstalled,
 		&device.IsEnabled,
 		&createdAt,
 		&updatedAt,
@@ -524,6 +530,13 @@ func getDeviceByID(
 		}
 		device.LastSeenAt = &parsed
 	}
+	if readinessAt.Valid {
+		parsed, err := parseTimestamp(readinessAt.String)
+		if err != nil {
+			return domain.Device{}, err
+		}
+		device.ReadinessAt = &parsed
+	}
 	device.CreatedAt, err = parseTimestamp(createdAt)
 	if err != nil {
 		return domain.Device{}, err