Render cloud task history from typed session events (#318646)

* CAPI package update

* Missindg updates

* Missing lock

* Render cloud task history from typed events

- Extract shared session-event-to-chat-parts renderer into
  chatSessions/common/sessionEventRenderer.ts so both the Copilot CLI
  and Cloud Tasks providers produce identical tool/text formatting.
- Render Task API history via the shared renderer, remapping
  custom_agent.* to the equivalent subagent.* names so tool cards,
  bash terminal output, edits, search results, MCP results and
  subagent groups all render the same way they do in the CLI.
- Match github.com/github/github-ui presentation by suppressing
  intermediate assistant.message events that echo tool input/output
  and only rendering the final summary message per turn.

* Address review: break circular dep & restore flush timing

- Inject CLI tool-event handlers (processStart/processComplete/
  enrichSubagent/isEditToolCall/getEditedUris) into the shared
  renderer via a ToolEventHandlers<T> bundle, so common/sessionEventRenderer
  no longer imports from copilotcli/. Layering now only flows one way.
- Flush buffered assistant.message_delta chunks at the top of the
  CLI loop for non-message events so the session.model_change /
  assistant.usage guards see streamed text exactly the way the
  pre-extraction code did.

* Missing lock changes

* Revert unintended copilot package manifest edits

* Revert unintended root package manifest edits

* remote package revert

* lock

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Co-authored-by: Dmitriy Vasyura <dmitriv@microsoft.com>