adventure: stop the log claiming a win it didn't see

Four things the review found, all of them the code telling a player
something that isn't true.

A run that walks into a dead end filed its ending as "cleared" whatever
the caller said, so both the liveblog and the summary reported a clear
for a party that merely ran out of map — and the end beat is
first-writer-wins, so nothing later could take it back. It says
"cleared" only for a boss now.

The re-offer branches of babysit and resume returned a zero cost, so a
player who was in fact charged read "0 coins" in the verdict. Both
re-quote the price they actually took.

And the realm-firsts reseed retired its one-shot job even when the read
under it had failed, which on a transient fault at Init would have left
the ledger mis-dated permanently. The read now says whether it worked,
and the job stays open when it didn't.

Claude-Session: https://claude.ai/code/session_012bxpQQJDjC1mTtLN3VVtBQ

internal/plugin/adventure_babysit.go

@@ -144,7 +144,14 @@ func (p *AdventurePlugin) performBabysitPurchase(uid id.UserID, days int, idemKe
 		// on the re-offer. The settled fee is what tells that apart from somebody
 		// who really does already have one.
 		if idemKey != "" && p.euro != nil && p.euro.HasExternalTx(idemKey) {
-			return babysitOutcome{Days: days, PetName: char.PetName}, nil
+			// Re-quote the fee rather than leaving it zero: the verdict this
+			// feeds prints the coin figure, and "0 coins" would be a false
+			// receipt for a hire the player did pay for.
+			return babysitOutcome{
+				Days:    days,
+				Cost:    babysitDailyCost(dndLevelForUser(char.UserID)) * days,
+				PetName: char.PetName,
+			}, nil
 		}
 		return babysitOutcome{}, refuseAdv(errBabysitActive, "🍼 The babysitter is already here. They're not leaving until the job is done.")
 	}