phsl / new-api

Summary
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1. Pricing generation
   • `model/pricing.go`: skip any model whose `status != 1` when building
     `pricingMap`, ensuring disabled models are never returned to the
     front-end.

2. Cache refresh placement
   • `controller/model_meta.go`
     – Removed `model.RefreshPricing()` from pure read handlers
       (`GetAllModelsMeta`, `SearchModelsMeta`).
     – Kept refresh only in mutating handlers
       (`Create`, `Update`, `Delete`), guaranteeing data is updated
       immediately after an admin change while avoiding redundant work
       on every read.

Result
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Front-end no longer receives information about disabled models, and
pricing cache refreshes occur exactly when model data is modified,
improving efficiency and consistency.