Issue #10: rewards bootstrapping

apps/econ/migrations/0016_objective_group.sql

@@ -0,0 +1,16 @@
+-- A player's objective *groups* — the daily/weekly sets their objectives belong to.
+-- The client clears a group when it's finished with it (`/api/objectives/v1/cleargroup`),
+-- which marks it completed and stamps the clear time; `myprogress` reads the groups
+-- back alongside the objectives themselves.
+--
+-- Keyed by (account, group), the client's own identifier. `group` is a SQL keyword,
+-- hence `group_id`. Owned by the `econ` worker; generated from src/objectives-db.ts
+-- (SCHEMA_DDL) — keep in sync.
+
+CREATE TABLE IF NOT EXISTS objective_group (
+  account_id INTEGER NOT NULL,
+  group_id INTEGER NOT NULL,
+  is_completed INTEGER NOT NULL DEFAULT 0,
+  cleared_at TEXT,
+  PRIMARY KEY (account_id, group_id)
+  );