MCP search/list tools now return object UUIDs so agents can act on what they find.

When an AI agent searches or lists your thoughts and insights, each result now includes the object's UUID. This means an agent that finds a thought via search_thoughts or list_thoughts can immediately use its id to attach a file, update, promote, or delete it — without needing a separate lookup. The same applies to search_insights. This unblocks the case where an agent could describe a thought it found but couldn't act on it.