fix: handle db_patch failure in buy scout token flow

Wrap the wallet deduction in try/except so a failed db_patch immediately
stops the view and shows an error, instead of leaving it open for 30s.

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

discord_ui/scout_view.py

@@ -339,7 +339,18 @@ class BuyScoutTokenView(discord.ui.View):
 
         # Deduct currency
         new_wallet = team["wallet"] - SCOUT_TOKEN_COST
-        await db_patch("teams", object_id=team["id"], params=[("wallet", new_wallet)])
+        try:
+            await db_patch(
+                "teams", object_id=team["id"], params=[("wallet", new_wallet)]
+            )
+        except Exception as e:
+            logger.error(f"Failed to deduct scout token cost: {e}")
+            await interaction.response.edit_message(
+                content="Something went wrong processing your purchase. Try again!",
+                view=None,
+            )
+            self.stop()
+            return
 
         self.scouter_team = team
         self.scouter_team["wallet"] = new_wallet