Write structured logs; send uncaught logs to portal log

[matthew-li]

Description

**** Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change. ****

• Added structlog and django-structlog as dependencies.
• Configured structlog to intercept all existing log messages and write them as structured logs.
• Added two log formatters:
  • Added a console_dev formatter for pretty printing logs.
  • Added a json formatter for writing logs as JSON.
• Updated log handlers:
  • Made the console handler use console_dev if DEBUG else json.
  • Made the file and api_file handlers use json.
    • If STREAM_LOGS_TO_STDOUT, made them use console_dev if DEBUG else json.
• Added a root logger to catch all uncaught logs and send them to file.
  • Some were previously written to the Apache log in mod_wsgi-based deployments.
  • django-q2 were previously written to files in /tmp.
• Added request ID and user ID to each log message (via django_structlog.middlewares.RequestMiddleware).

Type of change

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• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • There are no log parsers in place. However, some logs that were previously sent to the Apache log or to /tmp will now be sent to the portal log file.

How Has This Been Tested?

**** Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration. ****

• Ensure that test suite passes on GitHub Actions.
• Ensure that logs are pretty printed to stdout in the Docker development environment.
• Ensure that new logs are written to stdout in the Docker development environment.

PR Self Evaluation

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• My code follows the agreed upon best practices
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if needed)
• My changes generate no new warnings
• Any dependent changes have been merged and published in the appropriate modules
• I have performed a self-review of my own code