Add duel table migration for game mechanics

migrations/0007_duelv1.sql

@@ -0,0 +1,33 @@
+/*
+Kemoverse - a gacha-style bot for the Fediverse.
+Copyright © 2025 Waifu
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see https://www.gnu.org/licenses/. 
+*/
+CREATE TABLE duel (
+    duel_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    player_1_id INTEGER NOT NULL,
+    player_2_id INTEGER NOT NULL,
+    attacker_id INTEGER,
+    player_1_cards TEXT NOT NULL DEFAULT '[]',
+    player_2_cards TEXT NOT NULL DEFAULT '[]',
+    graveyard_p1 TEXT NOT NULL DEFAULT '[]',
+    graveyard_p2 TEXT NOT NULL DEFAULT '[]',
+    round INTEGER NOT NULL DEFAULT 1,
+    competitive BOOLEAN NOT NULL DEFAULT 0,
+    last_round_dt TEXT,
+    is_finished BOOLEAN NOT NULL DEFAULT 0,
+    points INTEGER NOT NULL DEFAULT 0,
+    winner_id INTEGER
+);