Adventure: Pete learns the word "retreat"

gogobee has started filing a `retreat` bulletin — an expedition that ended with
the player walking out alive. Pete had no case for it, and handleAdventureIngest
answers an unrecognized event_type with 400.

That failure is silent and total. gogobee's sender treats any non-2xx as a
failure, retries eight times over roughly two hours, and then parks the row for
good. A gogobee emitting `retreat` at a Pete who doesn't know the word would not
log an error anyone reads — it would just quietly drop every retreat the realm
ever files.

So Pete has to learn it BEFORE gogobee starts saying it. Deploy order matters
here, and it is Pete first.

The copy leads with everyone coming home, because that is the true and the kind
part: a retreat is a bad day, not a funeral. Bulletin tier — it rides the daily
digest and does not interrupt the room. Announcing every failed run live would
be a firehose, and an unkind one.

https://claude.ai/code/session_01B2MwktU4RgfWkar8HM3zZn

internal/web/adventure.go

@@ -188,6 +188,8 @@ func advEventMeta(eventType string) (label, emoji string) {
 		return "Pete's duels", "🤝"
 	case "milestone":
 		return "Milestone", "🏅"
+	case "retreat":
+		return "Pulled out", "🎒"
 	}
 	return "Dispatch", "📣"
 }
@@ -375,6 +377,19 @@ func renderAdventure(f AdvFact) (headline, lede string, ok bool) {
 	case "death":
 		return fmt.Sprintf("We lost %s in %s.", f.Subject, f.Zone),
 			fmt.Sprintf("Sad news to pass along: %s fell at level %d in %s. The graveyard's a little fuller tonight. Rest easy.", f.Subject, f.Level, f.Zone), true
+	case "retreat":
+		// An expedition that came apart without killing anyone. Until gogobee
+		// started sending these, the feed had no way to say "it went badly and
+		// everyone lived" — so it never said it, and the classes that retreat
+		// often simply never appeared. Warm, not a failure notice: everyone came
+		// home, and that is the part Pete leads with.
+		howFar := "barely a day in"
+		if f.Count > 1 {
+			howFar = fmt.Sprintf("%d days in", f.Count)
+		}
+		return fmt.Sprintf("%s backed out of %s.", f.Subject, f.Zone),
+			fmt.Sprintf("%s turned around %s — %s got the better of them this time%s, and they made the call to walk out rather than push it. Everybody came home breathing, which is the bit that counts. That dungeon'll still be there next week.",
+				f.Subject, howFar, f.Zone, atLevel), true
 	case "arrival":
 		return fmt.Sprintf("Welcome to the realm, %s!", f.Subject),
 			fmt.Sprintf("A new %s just walked through the gates. Say hello if you see them out there.", f.ClassRace), true