Salvages #66257 by @oppih (CI attribution check blocked the external
branch from merging).
When a provider's credential pool has entries but all are temporarily
rate-limited (exhausted), list_authenticated_providers() excluded the
provider from the interactive /model picker. Rate limits are per-model
for many providers (e.g. Google Gemini), so an exhausted key for
model-A may still work for model-B — the user should still be able to
select a different model under the same provider.
Adds a for_picker flag to list_authenticated_providers() that relaxes
the credential-pool availability check for the picker path only, falling
back to pool.has_credentials() when the pool has entries but none are
currently available. The runtime resolution path
(get_authenticated_provider_slugs) is unchanged, preserving the #45759
invariant that exhausted pools do not count as authenticated.
Co-authored-by: oppih <oppih@users.noreply.github.com>
An aggregator whose pooled credentials are all exhausted/dead still counted as
an authenticated provider during no-provider /model resolution. It then won the
model-name match, was set as the sticky session provider, and poisoned every
later switch with "empty API key" errors while still routing through the dead
aggregator.
list_authenticated_providers now requires a pool to have at least one available
entry (has_available, not has_credentials / bare key presence) at all three
credential-pool gates. Simple token-style entries that don't parse into
exhaustion-tracked entries keep the prior behaviour, so providers whose creds
live only in the auth-store credential_pool still appear.
Fixes#45759
