message: adding logging to document-context
diff: const authLog = require('@cardstack/logger')('cardstack/auth');
  -const log = require('@cardstack/logger')('cardstack/indexers');
  +const log = require('@cardstack/logger')('cardstack/indexing/document-context');
  const Model = require('../model');
  const { get, uniqBy } = require('lodash');
  @@ -69,6 +69,8 @@ module.exports = class DocumentContext {
  }
  async read(type, id) {
  + log.debug(`Reading record ${type}/${id}`);
  +
  this._references.push(`${type}/${id}`);
  let key = `${type}/${id}`;
  @@ -94,6 +96,7 @@ module.exports = class DocumentContext {
  }
  if (!this._searchDoc) {
  + log.debug(`Building ${this.type}/${this.id}`);
  this._searchDoc = await this._build(this.type, this.id, this.upstreamDoc, searchTree, 0);
  }
  if (this._searchDoc) {
  