8348520bdf
Implement a unified LLM Gateway supporting multiple API formats and providers: Features: - OpenAI Chat Completions, Responses API, and Anthropic Messages API - Provider adapters for OpenAI, Anthropic, Azure OpenAI, Google Gemini, AWS Bedrock - Model aliasing with weighted round-robin load balancing - Virtual API keys with RPM/TPM rate limiting - Budget control at key and project levels - Request logging, usage statistics, and audit logs - Fallback/retry with circuit breaker pattern - Admin CRUD APIs for providers, projects, keys, models, usage - Provider health checks Tech stack: - FastAPI with async SQLAlchemy 2.0 - SQLite with aiosqlite - bcrypt for API key hashing, AES-256 for provider key encryption - Docker containerization Tests: 18 passing integration tests for admin API endpoints Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>