refactor(copilotcli): move worktree properties and metadata tracking to session request lifecycle

[DonJayamanne]

Move the handling of worktree properties and request metadata tracking to the session request lifecycle, improving the organization of the code and ensuring that these actions occur at the appropriate time during the request process. This change simplifies the initialization process and enhances the clarity of the session management logic.

[github-actions]

Screenshot Changes

Base: e9aba237 Current: d1d5749d

Changed (1)

agentSessionsViewer/ApprovalRowLongLabel/Light

Before	After

[Copilot]

Pull request overview

Refactors Copilot CLI chat session handling so worktree property persistence, workspace-folder tracking, and request metadata recording occur during the request lifecycle (start of a request) rather than during session initialization/creation, clarifying responsibilities and timing.

Changes:

• Extend SessionRequestLifecycle.startRequest to record request details (agent + mode instructions) and to initialize worktree/workspace-folder metadata on the first request.
• Update CopilotCLIChatSessionParticipant to pass workspace + agent context into startRequest and propagate resolved agent information.
• Adjust initializer and tests to remove/relocate assertions now covered by request-lifecycle tests.

Show a summary per file

File	Description
extensions/copilot/src/extension/chatSessions/vscode-node/sessionRequestLifecycle.ts	Adds metadata/worktree/workspace-folder setup to startRequest and injects metadata/log services.
extensions/copilot/src/extension/chatSessions/vscode-node/copilotCLIChatSessions.ts	Passes workspace + agent info into request lifecycle and threads agent through session creation helpers.
extensions/copilot/src/extension/chatSessions/vscode-node/copilotCLIChatSessionInitializer.ts	Removes worktree/workspace-folder/metadata side-effects from initialization/creation paths.
extensions/copilot/src/extension/chatSessions/vscode-node/test/sessionRequestLifecycle.spec.ts	Adds coverage for new startRequest responsibilities.
extensions/copilot/src/extension/chatSessions/vscode-node/test/chatSessionInitializer.spec.ts	Updates expectations to reflect moved responsibilities out of initializer.

Copilot's findings

• Files reviewed: 5/5 changed files
• Comments generated: 1