WorkBuddy2API (Python) —— OpenAI/Anthropic 兼容网关（国内 CodeBuddy）
POST /v1/chat/completions /v1/completions /v1/responses /v1/embeddings
POST /v1/messages /v1/messages/count_tokens
GET  /v1/models /v1/dashboard/billing/subscription /v1/dashboard/billing/usage /v1/balance
GET  /health /status
鉴权: Authorization: Bearer <key> 或 X-Api-Key: <key>