feat: implement Candy Cannon mechanics, CI/CD pipelines, and version 2.3.7 updates

tests/test_gauntlet_cannon_timer.gd

@@ -0,0 +1,41 @@
+extends GutTest
+
+const GauntletManager = preload("res://scripts/managers/gauntlet_manager.gd")
+var gauntlet_manager: Node
+var main_mock: Node
+var gridmap_mock: Node
+
+func before_all():
+	gut.p("=== Feature Tests [Gauntlet #4 Cannon Timer] ===")
+
+func before_each():
+	main_mock = Node.new()
+	add_child(main_mock)
+	gridmap_mock = Node.new()
+	gridmap_mock.name = "EnhancedGridMap"
+	main_mock.add_child(gridmap_mock)
+	
+	gauntlet_manager = GauntletManager.new()
+	main_mock.add_child(gauntlet_manager)
+	gauntlet_manager.initialize(main_mock, gridmap_mock)
+
+func test_cannon_timer_initialization():
+	assert_eq(gauntlet_manager.cannon_timer, 0.0, "Timer should start at 0.0 before phase starts")
+	
+	# Manually start phase to setup interval
+	gauntlet_manager.current_phase = 0 # GauntletManager.Phase.OPEN_ARENA
+	var config = gauntlet_manager.phase_configs[0]
+	gauntlet_manager.cannon_interval = config["interval"]
+	gauntlet_manager.cannon_timer = gauntlet_manager.cannon_interval
+	
+	assert_eq(gauntlet_manager.cannon_timer, 5.0, "Timer should initialize to Phase 1 interval (5.0)")
+
+func test_volley_size_configuration():
+	assert_eq(gauntlet_manager.phase_configs[0]["volley"], 5, "Phase 1 volley size should be 5")
+
+func after_each():
+	if main_mock:
+		main_mock.queue_free()
+
+func after_all():
+	gut.p("=== Feature Tests Complete ===")