added PICK SKY ready gate: SigReservation.ready + countdown_remaining fields, Room.SKY_SELECT status + sig_select_started_at, sig_ready + sig_confirm views, WS notifiers for countdown_start/cancel/polarity_room_done/pick_sky_available, migration 0031, PICK SKY btn in hex center at SKY_SELECT, tray cell 2 sig card placeholder; FTs SRG1-8 written (pending JS/consumer)

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

src/apps/epic/migrations/0031_sig_ready_sky_select.py

@@ -0,0 +1,33 @@
+# Generated by Django 6.0 on 2026-04-09 04:53
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('epic', '0030_sigreservation_seat_fk'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='room',
+            name='sig_select_started_at',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='sigreservation',
+            name='countdown_remaining',
+            field=models.IntegerField(blank=True, null=True),
+        ),
+        migrations.AddField(
+            model_name='sigreservation',
+            name='ready',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='room',
+            name='table_status',
+            field=models.CharField(blank=True, choices=[('ROLE_SELECT', 'Role Select'), ('SIG_SELECT', 'Significator Select'), ('SKY_SELECT', 'Sky Select'), ('IN_GAME', 'In Game')], max_length=20, null=True),
+        ),
+    ]