chore(quality): close the last two release-PR reds

test-masking — I had missed one of the 34 flagged files: my first pass grepped only
paths under tests/, so open-sse/services/__tests__/tierResolver.test.ts was invisible.
Same #7866 cause as the other eight qwen-driven reductions: the "classifies Qwen as
free" case and qwen's entry in the batch list went with the removed provider, and the
batch indices dropped from 10 to 9 (61→59). Allowlisted with that evidence.

dast-smoke — all four Schemathesis findings are on the two OIDC endpoints documented
in the previous commit, and none is a defect. /api/auth/oidc/* is a BROWSER redirect
flow: it answers 302 to the IdP and 302 back to /login?oidc_error=... on every failure,
which Schemathesis reads as "accepted a schema-violating request", and it answers 400
when OIDC is not configured, which it reads as "rejected a schema-compliant request".
Keeping the endpoints in the spec is right — operators need them, and they are what
brought openapi coverage back over the baseline — so the flow is excluded from the fuzz
instead, with the reason inline in the workflow. The rest of /api/auth and /api/keys
stays in scope.

.github/workflows/dast-smoke.yml

@@ -59,8 +59,14 @@ jobs:
       - run: pip install schemathesis
       - name: Schemathesis smoke (high-risk endpoints, blocking)
         run: |
+          # /api/auth/oidc/* is a BROWSER redirect flow (302 to the IdP, 302 back to
+          # /login?oidc_error=... on every failure), not a REST endpoint: Schemathesis reads
+          # those 302s as "the API accepted a schema-violating request" and the configured-off
+          # 400 as "rejected a schema-compliant request". Documenting the flow in the spec is
+          # still right (operators need it); fuzzing it is not what this smoke is for.
           schemathesis run docs/openapi.yaml --url http://localhost:20128 \
             --include-path-regex '^/v1/(chat/completions|models)$|^/api/(auth|keys)' \
+            --exclude-path-regex '^/api/auth/oidc/' \
             --max-examples 8 --workers 4 --checks all --max-response-time 30 \
             --request-timeout 20 --suppress-health-check all --no-color
       - name: promptfoo injection-guard (blocking)