- Mark Phase 4 and Phase 5 as complete, indicating successful removal of fixed upstream connections and the introduction of dynamic routing based on request metadata.
- Implement `TokenManager` for handling authentication tokens and update gRPC client methods to support new features.
- Enhance tests for dynamic routing and token management, achieving significant coverage improvements.
- Begin preparations for Phase 6, outlining the structure for OAuth Device Flow and related tasks.
This commit finalizes key gRPC features and sets the stage for upcoming authentication enhancements.
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