[framework] chore: clarify Gateway framework and runner names

[zackcxb]

Summary

Rename the Gateway-backed framework and private orchestration helpers so names reflect Gateway/session ownership and do not imply OpenAI-only support. This is a naming-only cleanup; rollout, reward, protocol, and TransferQueue behavior are unchanged.

Changes

• Rename OpenAICompatibleAgentFramework to GatewayAgentFramework and update the package export plus default dynamic FQN.
• Rename private orchestration helpers to _run_batch_rollouts, _run_prompt_rollouts, _run_agent_episode_with_concurrency_limit, and _run_agent_episode.
• Preserve runner_name: the configured agent_runners key is the documented runner name matched by external agent_name.
• Keep AgentRunner, run_task, Task.run(), and Agent.run() unchanged; clarify the AgentRunner and framework docstrings.
• Keep the approved naming design/implementation plan outside the repository under cxb_dev/docs/plans.
• Audit recipes, examples, YAML, dynamic FQNs, and docs: they reference the stable AgentFrameworkRolloutAdapter, run_task, and runner configuration contracts, not the renamed private helpers or old framework class, so no recipe edits are required.

Compatibility and migration

The package export and default dynamic FQN now use:

uni_agent.framework.framework.GatewayAgentFramework

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 77.77778% with 4 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
uni_agent/framework/framework.py	66.66%	4 Missing ⚠️

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