feat(sync): add Novita AI model catalog sync

[Alex-yang00]

Summary

• Add a Novita AI model catalog sync provider
• Fetch model inventory from https://api.novita.ai/openai/v1/models
• Preserve existing hand-authored metadata and model inheritance
• Keep existing entries when the API response is account-scoped
• Skip remote-only models because the endpoint does not provide complete catalog metadata
• Wire NOVITA_API_KEY into the hourly sync workflow
• Add focused parser, API, registration, and retention tests

Data source

• Novita model list: https://novita.ai/docs/api-reference/model-apis-llm-list-models

Required repository secret

The sync job requires the NOVITA_API_KEY repository secret.

Validation

• bun test packages/core/test/novita-ai.test.ts — 9 passed
• bun validate — passed
• git diff --check — passed
• bun test packages/core/test/sync.test.ts — 193 passed, 2 unrelated existing failures (Hyper and DeepInfra expectations)

Notes

This is intentionally a conservative first implementation: it does not delete existing model files missing from the API response and does not create incomplete TOMLs for remote-only IDs.