feat(relay): persist MTConnect XML conditions into raw.conditions

[ottobolyos]

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[ottobolyos]

TODO:

• create cacheConditions() method:
  • create the method;
  • create unit tests for the method;
• create getCachedConditionIndex() method:
  • create the method;
  • create unit tests for the method;
• create table schema:
  • create the raw.conditions table;
  • create the public.conditions view;
  • create an index on the time, resolved_time, node_id columns;
  • create an index on the node_id, time columns;
• add the table into DB schema for DB schema initialisation and DB migration;
• create isCondition() method:
  • create the method;
  • create unit tests for the method;
• create getConditionIdentifiers() method:
  • create the method;
  • create unit tests for the method;
• create createCondition() method:
  • create the method;
  • create unit tests for the method;
• create persistCondition() method (probably in common/db.js):
  • create the method;
  • create unit tests for the method;
• update getHistoryRecords() to utilise isCondition(), cacheConditions() and persistCondition() methods:
  • update the method;
  • update the method unit tests;
• test this feature in a demo/prod l99 instance (e2e tests);
• release a new version of l99 images to Docker Hub.