Runs upgrade steps between ExAtlas versions.
Invoke after updating the atlas dep:
mix deps.update atlas
mix ex_atlas.upgradeOr via Igniter's aggregate upgrader:
mix igniter.upgrade atlasArguments
When called directly by mix igniter.upgrade, receives <from_version> <to_version>.
When called directly by you, reads versions from mix.lock and the current
atlas mix.exs; defaults to running all upgraders if versions can't be
determined.
Registered upgraders
0.1 → 0.2 — no-op (placeholder). Reserved for surface migrations
between the pre-Fly compute-only release and the infrastructure SDK
release that introduced ExAtlas.Fly.*.