Add hospital revival, Robbie bandit, MW/shop fixes, float64 scoring

- St. Guildmore's Memorial Hospital: !hospital command with Nurse Joy,
  procedural itemized billing, same-day revival, 6-hour dead timer,
  hospital ad after death, 2-hour nudge follow-up
- Robbie the Friendly Bandit: automated inventory cleaner, random daily
  visits (8-21 UTC, 40% chance), collects sub-tier gear at €50/item,
  donates to community pot, drops Get Out of Medical Debt Free card
- Fix MW auto-equip: T1 MW no longer replaces better equipped gear
- Fix shop MW block: allow purchasing upgrades over lower-tier MW
- Float64 equipment scoring: advEffectiveTier and advEquipmentScore
  return float64, no mid-calculation truncation (MW 1.25x, Arena 1.5x)
- Fix markdown rendering: convert *asterisk* to _underscore_ italics
  across all flavor text files (shop, blacksmith, rival, hospital)

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

internal/plugin/wordle.go

@@ -390,7 +390,7 @@ func (p *WordlePlugin) pickWord(length int, category WordleCategory) string {
 
 		// Try a few times to get a word that hasn't been used recently.
 		for range 10 {
-			word, err := p.dict.RandomWord(lang, "", length, length)
+			word, err := p.dict.RandomWord(lang, "", length, length, 500)
 			if err != nil {
 				slog.Warn("wordle: DreamDict random word failed, falling back", "err", err)
 				break