fix(models): undo OpenRouter provider pricing discounts

[chrarnoldus]

Summary

• preserve OpenRouter endpoint discount metadata in provider snapshots
• undo OpenRouter discounts in both providers-and-models detail views
• cover discount preservation in the shared pricing schema

Testing

• Not run locally; relying on CI as requested.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Reviewed the OpenRouter discount-preservation schema change and both providers-and-models display-price call sites; no correctness or security issues found.

Files Reviewed (3 files)

• apps/web/src/components/organizations/providers-and-models/OrganizationProvidersAndModelsPage.tsx
• packages/db/src/schema-types.test.ts
• packages/db/src/schema-types.ts

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_{Review guidance: REVIEW.md from base branch main}