code: Collection<TaskRecord> getTaskRecords(Tenant tenant) {
          checkServiceState();
          List<TaskRecord> taskRecords = new ArrayList<>();
          for(DRow row: DBService.instance(tenant).getAllRows(TaskManagerService.TASKS_STORE_NAME)) {
              String taskID = row.getKey();
              if (taskID.startsWith("_claim/")) {
                  continue;
              }
              Iterator<DColumn> colIter = row.getAllColumns(1024).iterator();
              TaskRecord taskRecord = buildTaskRecord(taskID, colIter);
              taskRecords.add(taskRecord);
          }
          return taskRecords;
      }
docs: Return all {@link TaskRecord}s stored in the Tasks table for the given tenant. This
  provides an account of all known tasks, past and present.
  
  @param tenant    {@link Tenant} to query.
  @return          Collection of TaskRecords representing all known task statuses.