IDE: Compaction Hooks, Workflow Run Search, and Memory for Sub-Agents

This release adds Pre Compaction and Post Compaction Hook triggers, so a Hook can run before or after Kiro compacts a conversation. It also adds search to the Workflow Runs view, compact workflow run cards, web fetches that ask sites for Markdown, and read-only Memory access for sub-agents. It fixes Agent Focus stalling on a window that did not finish connecting, an MCP token refresh outage forcing a new sign-in, and very large sessions that would not open.