Latest-version sweep across the Oban stack. Final state:
oban 2.22.1 (hexpm)
oban_pro 1.7.0 (vendored, latest in licensed repo)
oban_met 1.1.0 (vendored, latest in licensed repo and hexpm)
oban_web 2.12.3 (vendored from public hexpm)
oban_web was re-vendored via `mix hex.package fetch oban_web 2.12.3
--unpack` and dropped into vendor/oban_web. No local mods to
preserve — vendor commit history shows the dir was a vanilla
import.