feat(auth): add recent activity logging to access tracker

* Introduced AccessLogEntry type for logging access details
* Updated AccessTracker to maintain a recent activity log
* Modified Metrics to include recent activity log in response
* Added RecentActivityLog component to display logged activities

internal/app/status.go

@@ -44,9 +44,6 @@ type publicStatusResponse struct {
 func statusSnapshot(info buildinfo.Info, tracker *auth.AccessTracker, oauthEnabled bool, now time.Time) statusAPIResponse {
 	entries := tracker.Snapshot()
 	metrics := tracker.Metrics(20)
-	metrics.TopIPs = nil
-	metrics.TopAgents = nil
-	metrics.TopTools = nil
 	return statusAPIResponse{
 		Title:           "Avelon Memory Crystal Server (AMCS)",
 		Description:     "AMCS is a memory server that captures, links, and retrieves structured project thoughts for AI assistants using semantic search, summaries, and MCP tools.",