fix(agno): create agent spans for continued (human-in-the-loop) runs

[jarstingstall]

What this is

When an agno run pauses for human-in-the-loop input (requires_user_input, requires_confirmation, or external execution) and is later resumed, the resumed run produces no agent span. The instrumentor wraps the module-level run entrypoints in agno.agent._run (_run, _run_stream, _arun, _arun_stream) but not the continue-run entrypoints agno dispatches to on resume (_continue_run, _continue_run_stream, _acontinue_run, _acontinue_run_stream).

Concretely: an agent calls a requires_user_input tool → the run pauses (traced fine, ends with "I have tools to execute, but I need user input") → the user supplies input → agent.continue_run() / acontinue_run() executes the tool and finishes the run — and none of it has a root agent span. The continuation's model and tool spans start fresh traces with no root, so the resumed portion of the run — including the tool execution the pause was for — is effectively missing from the trace. We hit this in production with agno's AgentOS /continue endpoint: every HITL tool run appeared to vanish after the pause.

What's included

• Wrap the four continue-run entrypoints in agno.agent._run with the existing _RunWrapper methods (sync→run, sync stream→run_stream, async→arun, async stream→arun_stream), with the same getattr guards and uninstrument restoration as the existing wraps. The continue functions take the agent as their first argument, like _arun, so the wrappers apply unchanged. (Teams have no continue entrypoints — agent module only.)
• Continuation spans are named {agent}.continue_run / {agent}.acontinue_run, with stream variants collapsing to the base name — the same convention the existing .run/.arun spans use. Existing span names are unchanged (_span_method_name returns the current default for the non-continue entrypoints).
• Tests: wrapping + uninstrument restoration for all four functions, and span-creation tests asserting the span name, AGENT span kind, and session.id attribute.

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[jarstingstall]

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