Initial commit: OpenFUT Core

Offline Ultimate Team backend — game-independent REST API.

- 19 API endpoints: auth, profiles, clubs, cards, packs, squads,
  objectives, SBCs, match rewards, NPC market, statistics
- Axum + SQLite + SQLx with full migrations
- Weighted pack generator, SBC validation engine
- JSON-driven mod data (cards, packs, objectives, SBCs)
- 5 integration tests passing

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

data/objectives/daily.json

@@ -0,0 +1,24 @@
+[
+  {
+    "id": "daily_play_1_match",
+    "title": "Daily Match",
+    "description": "Play 1 match today.",
+    "objective_type": "daily",
+    "metric": "matchesplayed",
+    "target": 1,
+    "reward_coins": 500,
+    "reward_pack_id": null,
+    "reward_xp": 100
+  },
+  {
+    "id": "daily_score_3_goals",
+    "title": "Hat-Trick Hero",
+    "description": "Score 3 goals in matches today.",
+    "objective_type": "daily",
+    "metric": "goalsscored",
+    "target": 3,
+    "reward_coins": 750,
+    "reward_pack_id": null,
+    "reward_xp": 150
+  }
+]