zyycnandCodex 75773a4608 refactor: migrate to multi-provider gateway architecture ...

Rebuild the backend as the frozen gateway workspace with a single PostgreSQL schema, provider-owned OpenAI and xAI boundaries, and mirrored domain tests.

Restore the admin product contracts for accounts, model catalogs, usage observability, billing details, and provider-scoped settings without compatibility shims.

Co-authored-by: Codex <noreply@openai.com>

2026-07-25 00:33:11 +08:00

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architecture.md

refactor: migrate to multi-provider gateway architecture

2026-07-25 00:33:11 +08:00