feat(workspace): default-aggregation for task/state/memory

ships v0.5.0 phase 2.

api: three new aggregator endpoints for the per-mesh subsystems
that didn't have one yet.
- GET /v1/me/tasks — open + claimed by default; ?status=all
  surfaces completed (30d window). sorted open > claimed > done.
- GET /v1/me/state — every (key, value) row across the user's
  meshes, sorted by recency. ?key=foo filters to one key.
- GET /v1/me/memory?q=... — ilike on content + tags, no q
  returns the last 30 days. excludes forgotten rows.

cli (1.16.0): task list, state list, recall now route through
the matching aggregator when --mesh is omitted. --mesh foo
still scopes to one mesh (existing behavior preserved).

with this, every per-mesh read verb in the cli either has a
cross-mesh aggregator or doesn't need one. v0.5.0 substrate is
complete.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudemesh-cli",
-  "version": "1.15.0",
+  "version": "1.16.0",
   "description": "Peer mesh for Claude Code sessions — CLI + MCP server.",
   "keywords": [
     "claude-code",