The asyncio.gather in `_run_centralized_common_checks` ran with
`return_exceptions=False` and a single bare `except HTTPException`
arm, so an HTTPException from any one fetch (the realistic case is a
404 from `get_team_object` when a token references a deleted team)
zeroed out the user, end-user, project, and global-spend contexts in
addition to falling back the team object. That silently skipped the
user budget, end-user budget, and project enforcement passes inside
`common_checks` for the unrelated contexts that had actually fetched
fine.
Switch to `return_exceptions=True` and apply per-fetch fallback
(matches the pre-refactor per-fetch try/except pattern in the builder):
- ProxyException / BudgetExceededError still propagate as authz failures.
- HTTPException on the team fetch reconstructs from the token; on the
other fetches it nulls only that one context.
- Successful fetches always reach `common_checks` intact.
Adds two unit tests covering the team-404 and user-404 cases to lock
the per-fetch isolation in. Drops the inaccurate `PROXY_ADMIN tokens
short-circuit` claim from the docstring — admin tokens still flow
through `common_checks`; admin status is only honored where the
underlying check exempts it.
151d7ab1bc