update memory tool context

[bhavyaus]

No description provided.

[Copilot]

Pull request overview

This PR updates the Copilot Chat “memory” tool and related prompts to support a clearer memory model with user- and session-scoped storage, and adjusts Anthropic tool handling accordingly.

Changes:

• Add a /memories/session/ namespace (workspace/session-scoped) and route /memories/ to global (user-scoped) storage.
• Update agent prompts to include user + session memory context at chat start, and refresh memory tool instructions.
• Simplify Anthropic Messages API tool handling by removing special-casing for a built-in Anthropic memory tool and ensuring memory isn’t deferred when tool search is enabled.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/platform/networking/common/anthropic.ts	Marks memory as non-deferred for Anthropic tool-search scenarios.
src/platform/endpoint/node/messagesApi.ts	Removes built-in-memory injection/filtering; sends memory as a regular tool.
src/extension/tools/node/test/memoryTool.spec.tsx	Updates tests to use /memories/session/ paths and adds merged-root view test.
src/extension/tools/node/memoryTool.tsx	Implements user vs session scoping, merged root listing, and updated invocation messages.
src/extension/tools/node/memoryContextPrompt.tsx	Adds user memory content + session memory file listing into prompt context.
src/extension/tools/common/memoryCleanupService.ts	Expands isMemoryUri to recognize both workspace and global storage locations.
src/extension/prompts/node/agent/agentPrompt.tsx	Switches to new memory prompt components and threads sessionResource for session listing.
package.json	Updates tool description to document the new three-scope memory model.