[Response Ops] API to retrieve execution log entries from event log.

[ymao1]

Resolves #126837

Summary

Adds new HTTP API to retrieve execution log information.

To Verify

• Create a rule and let it run.
• Navigate to https://localhost:5601/internal/alerting/rule/<rule_id>/_execution_log?date_start=<ISO date string> and see entries for the execution log. Only date_start query parameter is required, all others have default values. Defaults to sorting by descending timestamp order with 10 results per page.
• Try passing in other query params like sort, page, and per page.
• Response should look like this:

{
      total: 374,
      data: [
        {
          id: '6705da7d-2635-499d-a6a8-1aee1ae1eac9',
          timestamp: '2022-03-07T15:38:32.617Z',
          duration_ms: 1056,
          status: 'success',
          message:
            "rule executed: example.always-firing:a348a740-9e2c-11ec-bd64-774ed95c43ef: 'test rule'",
          num_active_alerts: 5,
          num_new_alerts: 5,
          num_recovered_alerts: 0,
          num_triggered_actions: 5,
          num_succeeded_actions: 5,
          num_errored_actions: 0,
          total_search_duration_ms: 0,
          es_search_duration_ms: 0,
          timed_out: false,
          schedule_delay_ms: 3393,
        },
        {
          id: '41b2755e-765a-4044-9745-b03875d5e79a',
          timestamp: '2022-03-07T15:39:05.604Z',
          duration_ms: 1165,
          status: 'success',
          message:
            "rule executed: example.always-firing:a348a740-9e2c-11ec-bd64-774ed95c43ef: 'test rule'",
          num_active_alerts: 5,
          num_new_alerts: 5,
          num_recovered_alerts: 5,
          num_triggered_actions: 5,
          num_succeeded_actions: 5,
          num_errored_actions: 0,
          total_search_duration_ms: 0,
          es_search_duration_ms: 0,
          timed_out: false,
          schedule_delay_ms: 3456,
        },
      ],
    }

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

[mikecote]

Changes LGTM! Pulled down locally and saw the API return logs for a given rule 👍

[ymao1]

@elasticmachine merge upstream

[spong]

Fantastic @ymao1! 🙌 Thanks for all the collab here and helping nail down the queries -- really appreciate it! And of course thank you for getting the initial agg work into the event-log client as well too! LGTM! 🙂 🚀

[ymao1]

@elasticmachine merge upstream

[ymao1]

@elasticmachine merge upstream

[ymao1]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: b52adb1
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Metrics [docs]

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
alerting	18	20	+2

History

• 💔 Build #31931 failed 0b36943
• 💚 Build #31905 succeeded f0be261
• 💔 Build #31792 failed 2c3c19a
• 💛 Build #31670 was flaky acd64e4
• 💔 Build #31666 failed 427c062
• 💚 Build #31620 succeeded b92c825

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @ymao1