fix(migrations): add migration 0009 for display_password column

- Create 0009_add_display_password.sql migration
- Add entry to drizzle journal
- This adds the display_password column that was missing in production

The plan is to nuke the production database and let all migrations
run from scratch on container restart.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/web/drizzle/0009_add_display_password.sql

@@ -0,0 +1,2 @@
+-- Add display_password column to arcade_rooms for showing plain text passwords to room owners
+ALTER TABLE `arcade_rooms` ADD `display_password` text(100);

apps/web/drizzle/meta/_journal.json

@@ -64,6 +64,13 @@
       "when": 1760548800000,
       "tag": "0008_make_room_name_nullable",
       "breakpoints": true
+    },
+    {
+      "idx": 9,
+      "version": "7",
+      "when": 1760600000000,
+      "tag": "0009_add_display_password",
+      "breakpoints": true
     }
   ]
 }