v2.2.0: Performance fixes

Mostly performance fixes and some auth updates.

What's Changed

• Stable update v1.1.0: Ingest and Query Microservice by @OrdiNeu in #41
• v2.0.0: Dependency updates, authx updates by @daisieh in #51
• v2.1.0: Internal GitHub action by @OrdiNeu in #53
• v2.1.1: Tiny fixes by @daisieh in #56
• DIG-1664: Do not log service-info (prevent health check flooding) by @OrdiNeu in #57
• Don't pass in OPA_SECRET anymore by @daisieh in #59
• DIG-979: Move federation config to Vault service store by @daisieh in #60
• Pick up hotfix from UHN prod by @daisieh in #61
• Replace 'single quote' in PR titles by @mshadbolt in #62
• DIG-1719: switch to candigv2-logging module by @daisieh in #64
• Add the ability to send requests with "safe" checking, exiting early if the service info cannot be quickly communicated with by @OrdiNeu in #63
• Allow a greater number of worker threads, with a low default by @OrdiNeu in #65
• Set safe checking to be ON by default, and turned off with the Unsafe flag by @OrdiNeu in #66
• Bump flask-cors from 4.0.1 to 5.0.0 by @dependabot in #67
• DIG-1759: switch to gunicorn by @daisieh in #68
• DIG-1710: switch from Travis to GitHub Actions by @daisieh in #69
• v2.2.0: Performance fixes by @daisieh in #70
• hotfix: hardcode /federation into server urls by @daisieh in #71
• hotfixes by @daisieh in #72
• Don't allow a failing server to interrupt the entire heartbeat by @OrdiNeu in #73
• hotfix by @daisieh in #74
• Hotfix: respawn heartbeat, don't check your own heartbeat by @daisieh in #75
• merge hotfix by @daisieh in #76
• hotfix: better error handling if a server fails to register by @daisieh in #77
• Hotfix: error handling by @daisieh in #78
• hotfix: should log exception by @daisieh in #79
• hotfix: merging #79 by @daisieh in #80

Full Changelog: v2.1.1...v2.2.0