Issue #10: rewards bootstrapping

apps/econ/migrations/0014_reward_selection.sql

@@ -0,0 +1,22 @@
+-- Game-reward selections — the three-choice reward the client shows after a
+-- challenge or level-up. `/api/gamerewards/v1/request` mints one and pushes it to the
+-- player over the notifications hub; `/api/gamerewards/v1/select` consumes it.
+--
+-- The three offered drop ids are recorded so `select` can verify the player is
+-- claiming something they were actually offered, and `consumed` makes the selection
+-- single-use. Owned by the `econ` worker; generated from src/rewards-db.ts
+-- (SCHEMA_DDL) — keep in sync.
+
+CREATE TABLE IF NOT EXISTS reward_selection (
+  reward_selection_id INTEGER PRIMARY KEY AUTOINCREMENT,
+  account_id INTEGER NOT NULL,
+  message TEXT NOT NULL DEFAULT '',
+  gift_context INTEGER NOT NULL DEFAULT 0,
+  reward_type INTEGER NOT NULL DEFAULT 0,
+  gift_drop_1_id INTEGER NOT NULL,
+  gift_drop_2_id INTEGER NOT NULL,
+  gift_drop_3_id INTEGER NOT NULL,
+  consumed INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT
+  );
+CREATE INDEX IF NOT EXISTS idx_reward_selection_account ON reward_selection (account_id);