added poi columns to rooms table (#477)

migrations/000.549.sql

@@ -0,0 +1,8 @@
+ALTER TABLE rooms
+    ADD COLUMN poi_x REAL NOT NULL DEFAULT 0.5,
+    ADD COLUMN poi_y REAL NOT NULL DEFAULT 0.5;
+
+-- Add check constraints to ensure values stay between 0 and 1
+ALTER TABLE rooms
+    ADD CONSTRAINT poi_x_range CHECK (poi_x >= 0 AND poi_x <= 1),
+    ADD CONSTRAINT poi_y_range CHECK (poi_y >= 0 AND poi_y <= 1);