add Match model

main-server/db/migrate/20261103000000_create_matches.rb

@@ -0,0 +1,24 @@
+class CreateMatches < ActiveRecord::Migration[8.1]
+  def change
+    create_table :matches do |t|
+      t.string :uuid, null: false
+      t.references :player1, null: false, foreign_key: { to_table: :users }
+      t.references :player2, null: false, foreign_key: { to_table: :users }
+      t.integer :status, null: false, default: 0
+      t.text :game_server, null: false
+      t.datetime :started_at, null: false
+      t.datetime :finished_at
+      t.integer :duration_seconds
+      t.integer :player1_rating_before, null: false
+      t.integer :player2_rating_before, null: false
+      t.integer :player1_rating_change, null: false, default: 0
+      t.integer :player2_rating_change, null: false, default: 0
+
+      t.timestamps
+    end
+
+    add_index :matches, :uuid, unique: true
+    add_index :matches, [ :player1_id, :finished_at ]
+    add_index :matches, [ :player2_id, :finished_at ]
+  end
+end