feat(sense): complete T-006 five-stream integration

Sense/internal/store/sqlite.go

@@ -25,6 +25,25 @@ type ReconcileCandidate struct {
 	NextAttempt  *time.Time
 }
 
+type DeviceConvergence struct {
+	ID                 string              `json:"id"`
+	PathName           string              `json:"path_name"`
+	DesiredState       device.DesiredState `json:"desired_state"`
+	ActualState        device.ActualState  `json:"actual_state"`
+	Generation         int64               `json:"generation"`
+	ObservedGeneration int64               `json:"observed_generation"`
+	FailureCount       int                 `json:"failure_count"`
+	NextAttemptAt      *time.Time          `json:"next_attempt_at,omitempty"`
+	LastErrorCode      string              `json:"last_error_code,omitempty"`
+	Converged          bool                `json:"converged"`
+}
+
+type ConvergenceSnapshot struct {
+	Total       int                 `json:"total"`
+	Unconverged int                 `json:"unconverged"`
+	Devices     []DeviceConvergence `json:"devices"`
+}
+
 type SQLite struct {
 	db *sql.DB
 }
@@ -521,6 +540,76 @@ func (s *SQLite) UpdateActualState(ctx context.Context, id string, state device.
 	return nil
 }
 
+// RequestReconcile invalidates the observed generation without changing the
+// desired state or retry backoff. Runtime probes use it when MediaMTX loses a
+// configured path, including after a MediaMTX process restart.
+func (s *SQLite) RequestReconcile(ctx context.Context, id string, now time.Time) error {
+	result, err := s.db.ExecContext(ctx, `
+		UPDATE sense_reconcile_state
+		SET observed_generation = 0, updated_at = ?
+		WHERE device_id = ?`, formatTime(now), id)
+	if err != nil {
+		return fmt.Errorf("request device reconciliation: %w", err)
+	}
+	if affected, _ := result.RowsAffected(); affected != 1 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// ConvergenceSnapshot returns only identifiers, state and counters. Endpoint
+// and credential references are deliberately excluded from diagnostics.
+func (s *SQLite) ConvergenceSnapshot(ctx context.Context) (ConvergenceSnapshot, error) {
+	rows, err := s.db.QueryContext(ctx, `
+		SELECT d.id, d.path_name, d.desired_state, d.actual_state, d.generation,
+			r.observed_generation, r.failure_count, r.next_attempt_at, r.last_error_code
+		FROM sense_devices d
+		JOIN sense_reconcile_state r ON r.device_id = d.id
+		WHERE d.desired_state = 'enabled'
+			AND EXISTS (
+				SELECT 1 FROM sense_device_capabilities c
+				WHERE c.device_id = d.id AND c.capability = 'video_capture'
+			)
+		ORDER BY d.id`)
+	if err != nil {
+		return ConvergenceSnapshot{}, fmt.Errorf("query convergence snapshot: %w", err)
+	}
+	defer rows.Close()
+	snapshot := ConvergenceSnapshot{Devices: make([]DeviceConvergence, 0)}
+	for rows.Next() {
+		var value DeviceConvergence
+		var nextAttempt, lastError sql.NullString
+		if err := rows.Scan(
+			&value.ID, &value.PathName, &value.DesiredState, &value.ActualState,
+			&value.Generation, &value.ObservedGeneration, &value.FailureCount,
+			&nextAttempt, &lastError,
+		); err != nil {
+			return ConvergenceSnapshot{}, fmt.Errorf("scan convergence snapshot: %w", err)
+		}
+		if nextAttempt.Valid {
+			parsed, parseErr := parseTime(nextAttempt.String)
+			if parseErr != nil {
+				return ConvergenceSnapshot{}, parseErr
+			}
+			value.NextAttemptAt = &parsed
+		}
+		if lastError.Valid {
+			value.LastErrorCode = lastError.String
+		}
+		value.Converged = value.ObservedGeneration == value.Generation &&
+			value.FailureCount == 0 && value.ActualState == device.ActualOnline
+		if !value.Converged {
+			snapshot.Unconverged++
+		}
+		snapshot.Devices = append(snapshot.Devices, value)
+	}
+	if err := rows.Err(); err != nil {
+		return ConvergenceSnapshot{}, fmt.Errorf("iterate convergence snapshot: %w", err)
+	}
+	snapshot.Total = len(snapshot.Devices)
+	return snapshot, nil
+}
+
 const deviceColumns = `d.id, d.tenant_id, d.site_id, d.serial_number, d.name, d.modality,
 		d.desired_state, d.actual_state, d.endpoint_ref, d.credential_ref,
 		d.path_name, d.generation, d.created_at, d.updated_at`