Benson K B 14afdcb923 fix(routing): fallback to default model alias seeds when unmapped in database (#10124) ...

* fix(routing): fallback to default model alias seeds when unmapped in database

* fix(routing): rename seed-fallback resolver; hermetic 401 regression test

Maintainer review (PR #10124):
1. Rename resolveModelAlias -> resolveModelAliasWithSeedFallback (and
   resolveModelAliasOnBody -> resolveModelAliasWithSeedFallbackOnBody) to
   avoid the export collision with the sync resolveModelAlias in
   open-sse/services/modelDeprecation.ts and
   src/shared/constants/modelSpecs.ts.
2. Regression test now reproduces the 401: alias unmapped in the (empty,
   DATA_DIR-isolated) modelAliases namespace but present in the static seed
   resolves to the seed target instead of passing through unmapped.
3. Test isolates DATA_DIR (temp dir + resetDbInstance) instead of reading
   the operator's live DB.

* fix(models): add outputTokenLimit to CustomModelEntry

Fixes the open-sse typecheck gate regression: catalog.ts reads
model.outputTokenLimit (for max_output_tokens in custom model metadata)
but CustomModelEntry only declared inputTokenLimit — TS2551. The
field exists in the runtime model data and is already consumed; the
interface just never declared it.

2026-08-17 08:21:53 -03:00

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