The pin still said ==1.0.*, which caps downstream at 1.0.5 and hides
every fix since. Now that 1.1.1 is actually in the registry the pin can
move; it was missed when 1.1.0 was tagged.
TransientError and SourceDeadError read like caller-facing contracts in
the taxonomy table, but the retry loop catches both and repackages them as
AllSourcesExhausted, so they never arrive. That is only discoverable by
reading middleware/retry.py, and a downstream project wrote a whole design
section on the false premise before checking.
The new table states the split outright, including that
GovernanceBackendError now sits on the caller-facing side and
SourceNotConfiguredError deliberately does not join the retryable family.
iomgaa