2ef6291307
The Python Together LLM and embedder ignored TOGETHER_API_BASE, unlike their TypeScript siblings, so users behind a gateway or proxy could not redirect Together traffic. Add together_base_url to a new TogetherConfig (LLM side) and to BaseEmbedderConfig (embedder side, matching the existing openai_base_url/huggingface_base_url pattern), and resolve base_url with explicit config value > TOGETHER_API_BASE env var > hardcoded default in both mem0/llms/together.py and mem0/embeddings/together.py. Also register TogetherConfig in LlmFactory.provider_to_class so config dicts routed through Memory pick it up. Closes #6587