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/adventure_flavor_closing.go

@@ -191,14 +191,11 @@ var ClosingFailure = []string{
 var ClosingDeath = []string{
 	"─────────────────────────────\n" +
 		"That's your day. Healthcare has the rest.\n\n" +
-		"A separate DM is inbound with the details.\n" +
-		"The details are not good. You already know the details.\n\n" +
-		"Next action: after recovery\n" +
-		"Morning DM: {morning_time} UTC — subject to medical clearance.",
+		"🏥 A DM from St. Guildmore's is on its way.\n" +
+		"Type `!hospital` for same-day revival.",
 
 	"─────────────────────────────\n" +
 		"Day over. Healthcare is involved.\n" +
-		"Expect a DM shortly with the full situation.\n\n" +
-		"The full situation: {location} won today.\n" +
-		"Tomorrow is pending insurance confirmation.",
+		"🏥 St. Guildmore's has been notified.\n\n" +
+		"Check your DMs, or type `!hospital`.",
 }