Mechanical rename addressing review 6141 on #519: "consolidated launch" was
unclear about what it composes. Rename the per-backend module
`consolidated_launch.py` -> `infra_launch.py` and the error
`ConsolidatedLaunchError` -> `InfraLaunchError` across all three backends and
their callers/tests. Unify the three identical per-backend error classes into
one `InfraLaunchError` defined in `backend/base.py` (re-exported by each
`infra_launch`) so the base backend can raise and catch a single shared type —
groundwork for the base owning the gateway-attach flow.
Add a glossary entry defining **infra** = the per-host gateway + orchestrator
service pair every bottle attaches to.
No behavior change.
Refs #516, #519.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
didericis-claude
56cbd4a257