docs: move changelog entries to 2.0.48

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,8 @@ For detailed release notes, see the [full changelog on the documentation site](h
 
 ## [Unreleased]
 
+## [2.0.48] - 2026-05-09
+
 - **Container config moved to DB.** Per-agent-group container runtime config (provider, model, packages, MCP servers, mounts, skills) now lives in the `container_configs` table instead of `groups/<folder>/container.json`. Existing filesystem configs are backfilled automatically on startup. Managed via `ncl groups config get/update` and `config add-mcp-server/remove-mcp-server/add-package/remove-package`.
 - **Explicit restart with on-wake messages.** Config CLI operations no longer auto-kill containers. New `ncl groups restart` command with `--rebuild` and `--message` flags. On-wake messages (`on_wake` column on `messages_in`) are only picked up by a fresh container's first poll, preventing dying containers from stealing them during the SIGTERM grace period. Self-mod approval handlers (`install_packages`, `add_mcp_server`) use the same race-free mechanism.
 - **Per-group CLI scope.** New `cli_scope` setting on container config (`disabled` / `group` / `global`, default `group`). Controls what the agent can access via `ncl` from inside the container. `disabled` excludes CLI instructions from CLAUDE.md and blocks all requests. `group` (default) restricts to own-group resources with auto-filled args. `global` gives unrestricted access (set automatically for owner agent groups). Includes post-handler result filtering to prevent cross-group data leaks and blocks `cli_scope` escalation from group-scoped agents.