feat: add MFA to logs

[firestack]

Asana Ticket: https://app.asana.com/0/1205385723132845/1205805997139906/f

Example Searches:

• index="skate-dev-blue-application" "mfa=Schedule.Gtfs.FeedInfo.log_gtfs_version"
  • https://mbta.splunkcloud.com/en-US/app/search/search?sid=1722868815.5664121
• index="skate-dev-blue-application" "mfa=Schedule.Gtfs.*"
  • https://mbta.splunkcloud.com/en-US/app/search/search?sid=1722868885.5664406
• index="skate-dev-blue-application" mfa=*
  • https://mbta.splunkcloud.com/en-US/app/search/search?sid=1722868710.5663706

[github-actions]

Coverage of commit 18b9d07

Summary coverage rate:
  lines......: 93.1% (3319 of 3566 lines)
  functions..: 72.6% (1357 of 1870 functions)
  branches...: no data found

Files changed coverage rate: n/a

Download coverage report

[firestack]

note: I'd like to consider moving the [$level] to before the $metadata, since $level is more stable than $metadata, what do y'all think @mbta/skate-developers ?

I'd do this in another PR.

[joshlarson]

🎄

[joshlarson]

note: I'd like to consider moving the [$level] to before the $metadata, since $level is more stable than $metadata, what do y'all think @mbta/skate-developers ?

I'd do this in another PR.

I support this on all counts.