room seat cron backstop: expire_lapsed_room_seats sweeps idle mid-game tables — TDD

Phase 6 (final) of the room GATE VIEW + seat-renewal sprint. Cron
backstop mirroring delete_stale_my_sea_draws — the lazy
_expire_lapsed_seats already frees seats on every room/gate-view access,
but a mid-game table nobody reopens past the grace window would keep its
stuck seats forever. This command runs the same sweep over every room
holding a timestamped FILLED slot. No flags; idempotent.

Tests: ExpireLapsedRoomSeatsCommandTest (2) — frees a >2S lapsed seat +
flags RENEWAL_DUE; no-op within grace. Full project suite 1590 ITs/UTs
green.

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/apps/epic/management/commands/expire_lapsed_room_seats.py

@@ -0,0 +1,35 @@
+"""Auto-BYE gamers whose room seat token cost lapsed past the renewal grace.
+
+The lazy `_expire_lapsed_seats` inside the room view / gatekeeper /
+gate-view already frees lapsed seats on every access; this command is the
+cron backstop for rooms nobody reopens — a mid-game table left idle past
+the grace window (filled_at + 2*renewal_period) would otherwise keep its
+stuck seats forever. Mirrors `delete_stale_my_sea_draws`. No flags;
+idempotent.
+
+Usage:
+    python manage.py expire_lapsed_room_seats
+"""
+from django.core.management.base import BaseCommand
+
+from apps.epic.models import GateSlot, Room
+from apps.epic.views import _expire_lapsed_seats
+
+
+class Command(BaseCommand):
+    help = "Free room seats whose token cost lapsed past the renewal grace."
+
+    def handle(self, *args, **options):
+        rooms = Room.objects.filter(
+            gate_slots__status=GateSlot.FILLED,
+            gate_slots__filled_at__isnull=False,
+        ).distinct()
+        freed = 0
+        for room in rooms:
+            before = room.gate_slots.filter(status=GateSlot.FILLED).count()
+            _expire_lapsed_seats(room)
+            if room.gate_slots.filter(status=GateSlot.FILLED).count() < before:
+                freed += 1
+        self.stdout.write(self.style.SUCCESS(
+            f"Freed lapsed seats in {freed} room{'s' if freed != 1 else ''}."
+        ))