[rooms] room progression

apps/rooms/migrations/0025_room_xp.sql

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+-- Room experience — the XP a player has earned in one room.
+--
+-- Generated from packages/domain/src/room-xp-db.ts (ROOM_XP_SCHEMA_DDL) — keep in sync.
+--
+-- One row per (room, player), read by `GET /rooms/:id/experience/player` as `Experience`.
+-- A player with no row reads as 0 XP; reads never insert. The `ConcurrencyCode` that
+-- response carries is minted per response, not stored.
+--
+-- Whether a room has progression on, and its daily cap, live on the room blob
+-- (`progressionEnabled` / `progressionDailyLimit`, set by `POST /rooms/:id/experience`).
+
+CREATE TABLE IF NOT EXISTS room_xp (
+  room_id INTEGER NOT NULL,
+  player_id INTEGER NOT NULL,
+  xp INTEGER NOT NULL DEFAULT 0,
+  PRIMARY KEY (room_id, player_id)
+);