Timestamp qa checks

[jc-harrison]

Closes #2627

I have:

• Formatted any Python files with black
• Brought the branch up to date with master
• Added any relevant Github labels
• Added tests for any new additions
• Added or updated any relevant documentation
• Added an Architectural Decision Record (ADR), if appropriate
• Added an MPLv2 License Header if appropriate
• Updated the Changelog

Description

Adds two new FlowETL QA checks: earliest_timestamp.sql and latest_timestamp.sql.

[greenape]

Awesome

[cypress]

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Test summary

43 • 0 • 0 • 0

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Run details

Project	FlowAuth
Status	Passed
Commit	5401d74
Started	Jun 2, 2020 6:08 PM
Ended	Jun 2, 2020 6:11 PM
Duration	02:22 💡
OS	Linux Debian - 8.11
Browser	Electron 80

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[codecov]

Codecov Report

Merging #2628 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2628   +/-   ##
=======================================
  Coverage   93.86%   93.86%           
=======================================
  Files         241      241           
  Lines        9401     9401           
  Branches      851      851           
=======================================
  Hits         8824     8824           
  Misses        448      448           
  Partials      129      129           

Flag	Coverage Δ
#autoflow_unit_tests	92.99% <ø> (ø)
#flowapi_unit_tests	65.63% <ø> (ø)
#flowauth_unit_tests	84.89% <ø> (ø)
#flowclient_unit_tests	76.83% <ø> (ø)
#flowetl_unit_tests	100.00% <ø> (ø)
#flowkit_jwt_generator_unit_tests	100.00% <ø> (ø)
#flowmachine_unit_tests	91.31% <ø> (ø)
#integration_tests	71.94% <ø> (ø)

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