List live session events

Poll incremental agent activity. Paging: pass the previous next_seq as after_seq to receive only newer events, until items is empty. Add wait_ms to have a poll that finds nothing new wait for the next event of a running session instead of returning at once. Order: seq is the delivery cursor, not the order things happened in. A streamed event (a reply, reasoning, a tool's live output) keeps its id and reappears with a higher seq each time its snapshot grows, so by seq it can be listed after events that happened later, and a poller can receive the same id in more than one page. To read the transcript, keep the copy of each id with the highest seq and sort by position: the seq the event first appeared at, which never changes and is unique in the Session. Numbers: seq and position are the Attempt's number times 4294967296 (2^32) plus a counter inside that Attempt. They jump by about 4.29 billion whenever a follow-up, a retry or a machine change starts a new Attempt, and they have gaps where an event is hidden from this projection or a streamed event moved on from an earlier snapshot; compare them, never count with them. Content: view=conversation returns only assistant, reasoning, tool_use and tool_result events, for any caller, and leaves the cursor unchanged. In the debug projection a streamed event's data.stream_position_seq is its position and data.stream_revision is the counter part of its current seq. There, a result event's data.run_status is the internal lifecycle status of the execution Attempt that produced it (succeeded means it ran to completion, which the session reports as status exit); it is not the task verdict, which is the session's outcome. Without view, sessions:read returns status events with null text/data, plus assistant, reasoning, tool_use and tool_result events with their text and a fixed set of data fields (tool, tool_use_id, input, content, is_error, is_partial, duration_ms, stream_key, item_id). An organization owner/admin may add sessions:debug for the full diagnostic projection: diagnostic event kinds, status text and raw event metadata.

_{Scope: sessions:read or sessions:debug}