Files
evanpelle 3c0ff7a6f2 Fail open on clan tag ownership checks when API is unavailable
The clan-tag ownership check previously failed closed: when the API
service was unreachable (e.g. during local development), the client
dropped the tag with a "couldn't verify" error and the server's
FailOpenPrivilegeChecker treated every unverifiable tag as reserved.
This made clan tags unusable whenever the API was down.

- Client: checkClanTagOwnership keeps the tag when the existence
  probe is inconclusive; the server still re-checks authoritatively.
- Server: FailOpenPrivilegeChecker passes tags through instead of
  dropping non-member tags; decideClanTag now takes a non-nullable
  reserved set since the null case is gone.
- Remove the now-unused username.tag_check_failed translation key.
- Update Privilege and ClanApiQueries tests for fail-open behavior.

Trade-off: if the reserved-tag list is unavailable in production,
real clan tags can be impersonated until the first successful
PrivilegeRefresher load; after that the last good checker is retained.
2026-06-11 12:22:33 -07:00
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