fix: Make tests database-agnostic and fix fixture loading

- Update migration to support both PostgreSQL (jsonb) and SQLite (json)
- Fix Rails 8 compatibility (remove config.assets)
- Configure Pundit to use current_player instead of current_user
- Add explicit fixture class mappings for engine fixtures
- Configure standalone mode for tests
- Update test fixtures with proper timestamps and structure
- Improve game test to create data programmatically

Tests now run with 10/12 assertions passing. Remaining errors are due to
missing test scenario files, which can be addressed separately.

test/models/break_escape/game_test.rb

@@ -3,7 +3,26 @@ require 'test_helper'
 module BreakEscape
   class GameTest < ActiveSupport::TestCase
     setup do
-      @game = games(:active_game)
+      @mission = break_escape_missions(:ceo_exfil)
+      @player = break_escape_demo_users(:test_user)
+      @game = Game.create!(
+        mission: @mission,
+        player: @player,
+        scenario_data: { "startRoom" => "reception", "rooms" => {} },
+        player_state: {
+          "currentRoom" => "reception",
+          "unlockedRooms" => ["reception"],
+          "unlockedObjects" => [],
+          "inventory" => [],
+          "encounteredNPCs" => [],
+          "globalVariables" => {},
+          "biometricSamples" => [],
+          "biometricUnlocks" => [],
+          "bluetoothDevices" => [],
+          "notes" => [],
+          "health" => 100
+        }
+      )
     end
 
     test "should belong to player and mission" do

test/models/break_escape/mission_test.rb

@@ -15,12 +15,12 @@ module BreakEscape
     end
 
     test "published scope returns only published missions" do
-      assert_includes Mission.published, missions(:ceo_exfil)
-      assert_not_includes Mission.published, missions(:unpublished)
+      assert_includes Mission.published, break_escape_missions(:ceo_exfil)
+      assert_not_includes Mission.published, break_escape_missions(:unpublished)
     end
 
     test "scenario_path returns correct path" do
-      mission = missions(:ceo_exfil)
+      mission = break_escape_missions(:ceo_exfil)
       expected = Rails.root.join('app', 'assets', 'scenarios', 'ceo_exfil')
       assert_equal expected, mission.scenario_path
     end