Summary

Add MiniMax as a first-class AI provider in seekdb's AI service framework, enabling users to use MiniMax's LLM and embedding models for in-database AI workflows.

Changes

• Provider registration: Add MINIMAX to VALID_PROVIDERS[] in ob_ai_service_struct.cpp
• Provider constant: Add MINIMAX to ObAIFuncProviderUtils in ob_ai_func_utils.h
• LLM completion: Route MiniMax completion to OpenAI-compatible handler (MiniMax /v1/chat/completions API is fully OpenAI-compatible)
• Embedding: Add ObMiniMaxUtils::ObMiniMaxEmbed custom handler for MiniMax native embedding API (embo-01, 1536 dimensions), which uses texts instead of input and vectors instead of data in request/response
• Unit tests: 12 tests in test_ob_minimax_utils.cpp covering header, body construction, response parsing, edge cases, and provider routing
• Integration test: MiniMax endpoint CRUD test in test_ai_service.cpp
• Documentation: Update README.md and README_CN.md to list MiniMax as a supported AI provider

MiniMax Models

Usage Example

-- Register MiniMax LLM endpoint
CALL DBMS_AI_SERVICE.CREATE_AI_MODEL_ENDPOINT('minimax_llm', '{
  "url": "https://api.minimax.io/v1/chat/completions",
  "access_key": "your-minimax-api-key",
  "ai_model_name": "minimax_model",
  "provider": "MINIMAX",
  "request_model_name": "MiniMax-M2.7"
}');

-- Register MiniMax embedding endpoint
CALL DBMS_AI_SERVICE.CREATE_AI_MODEL_ENDPOINT('minimax_embed', '{
  "url": "https://api.minimax.io/v1/embeddings",
  "access_key": "your-minimax-api-key",
  "ai_model_name": "minimax_embed_model",
  "provider": "MINIMAX",
  "request_model_name": "embo-01"
}');

Test Plan

• Unit tests pass: test_ob_minimax_utils (12 tests covering header/body/parse/routing)
• Integration test: test_minimax_ai_model_endpoint in test_ai_service (endpoint CRUD)
• Existing tests unaffected (no changes to other provider logic)
• MiniMax completion works with MiniMax-M2.7 model
• MiniMax embedding works with embo-01 model