v0.1.0 — initial fine-tuned router model

DistilBERT-base-uncased fine-tuned on 600 synthetic examples (150 per class), 4 epochs.

Held-out evaluation (40 handcrafted examples, see eval/data/routing_testset.jsonl):

• Accuracy: 0.975
• F1 (macro): 0.975

The Cloud Run / Docker entrypoint pulls this tarball at container start when MODEL_RELEASE_URL points to it.