model-mapper 1.2

Added

• Explicit model_routes config for choosing which upstream handles each client-facing model.
• Web UI routing table preserves each upstream's full model catalog while allowing per-tier mixed routing.
• Regression test for mixed routing when multiple upstreams define the same client model names.
• MODEL_MAPPER_CONFIG environment variable for selecting a config file path.

Changed

• Request dispatch resolves upstream selection from model_routes first, then falls back to default_upstream.
• Documentation and sample config now describe model_routes + upstreams[].mappings[].

Fixed

• New processes started from the project directory read the local config.json.
• Web UI add-upstream flow works after fixing a JavaScript parse error.
• Mixed upstream routing no longer collapses all model tiers onto the global default upstream.