Add multi-tag personality archetype system

Replace single first-match archetype with comprehensive multi-tag system
spanning 25 archetypes across 8 categories (Communication, Temporal,
Emotional, Economy, Games, Adventure, Social). Archetypes are computed
nightly via cron job querying 15+ tables and cached in user_archetypes.
Thresholds calibrated against real community data. Integrates with
!personality, !superstatsexplusalpha, !whois, and milk carton flavor text.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

main.go

@@ -309,6 +309,9 @@ func main() {
 	setupScheduledJobs(scheduler, client, wotdPlugin, holidaysPlugin, gamingPlugin, birthdayPlugin, animePlugin, moviesPlugin, concertsPlugin, esteemedPlugin, forexPlugin, minifluxPlugin, marketPlugin)
 	scheduler.Start()
 
+	// ---- Initial archetype calculation ----
+	go plugin.RefreshAllArchetypes()
+
 	// ---- Start syncing ----
 	slog.Info("GogoBee starting sync...")
 
@@ -461,6 +464,12 @@ func setupScheduledJobs(
 		plugin.MarkovPurgeExpired()
 	})
 
+	// Archetype refresh at 04:30 daily
+	c.AddFunc("30 4 * * *", func() {
+		slog.Info("scheduler: refreshing archetypes")
+		plugin.RefreshAllArchetypes()
+	})
+
 	// Miniflux RSS polling
 	if miniflux != nil {
 		interval := fmt.Sprintf("@every %dm", miniflux.PollInterval())