Select a Hive runtime inference profile from Ops

Hive’s agentic workflows can now be retargeted to a different model at runtime, without redeploying. Admins can assign a standard inference or embedding profile to Hive from the Ops profile actions control, and Hive’s own agents will route through the OpenAI-compatible gateway under the model name openai:<profile-name>. Moving the role to a different profile invalidates Hive’s old role tokens, and HIVE_LLM_* environment variables still work as a fallback when no Hive profile is selected, so existing deployments keep running until you opt in.