CAPACITY_PATTERN (the gate that sets result.capacity_failure) lacked the
bare unauthorized/forbidden/401/403 signals that classify_capacity_failure
already recognizes, so an auth blip surfacing only as "403 Forbidden"
was blocked as capability instead of transient: no auto failover, no
health cooldown. Add 401|403|unauthorized|forbidden to the gate so it
matches the classifier; reason classification still distinguishes auth
from quota/rate-limit/transport.
Tests: an auto card failing with only "403 Forbidden" now fails over to
the other provider, records an auth cooldown (authenticated:false), and
classifies the fallback reason as auth in metrics; a manual card with the
same failure still fails closed as transient. Router-outage tests moved to
test_hermes_cli_router_outage.py to keep both files <500 LOC.
Based on PR #15 (fix/hermes-result-decomposition-reliability).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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