feat(world): generic dive site scene fed by a baked site definition

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tools/sites/vehicle_test_terrain_recipe.gd

@@ -2,6 +2,10 @@ class_name VehicleTestTerrainRecipe
 extends RefCounted
 
 const SiteTerrainBaker = preload("res://tools/site_terrain_baker.gd")
+const SiteTerrainData = preload("res://game/domain/sites/site_terrain_data.gd")
+const TerrainHeightField = preload("res://game/domain/sites/terrain_height_field.gd")
+const DiveSiteDefinition = preload("res://game/domain/sites/dive_site_definition.gd")
+const SitePlacement = preload("res://game/domain/sites/site_placement.gd")
 
 
 static func recipe() -> SiteTerrainBaker.Recipe:
@@ -23,3 +27,25 @@ static func recipe() -> SiteTerrainBaker.Recipe:
 		SiteTerrainBaker.Ripples.new(Vector2(0.0, 1.0), TAU / 0.048, 0.9, Vector2.ZERO, 0.0),
 	]
 	return result
+
+
+static func definition(terrain: SiteTerrainData) -> DiveSiteDefinition:
+	var field := TerrainHeightField.from_data(terrain)
+	var result := DiveSiteDefinition.new()
+	result.site_id = &"vehicle_test"
+	result.display_name = "Site de calibration du véhicule"
+	result.terrain = terrain
+	result.playable_bounds_m = Rect2(-90.0, -176.0, 180.0, 204.0)
+	result.spawn_position_m = Vector3(0.0, -12.0, 12.0)
+	result.spawn_yaw_radians = 0.0
+	var target := SitePlacement.new()
+	target.placement_id = &"calibration_target"
+	target.kind = SitePlacement.Kind.WRECK_DECOY
+	target.position_m = Vector3(0.0, field.elevation_at(0.0, -58.0) + 2.5, -58.0)
+	target.footprint_m = Vector3(8.0, 5.0, 7.0)
+	var anchor := SitePlacement.new()
+	anchor.placement_id = &"navigation_beacon"
+	anchor.kind = SitePlacement.Kind.VESSEL_ANCHOR
+	anchor.position_m = Vector3(0.0, -15.0, -22.0)
+	result.placements = [target, anchor]
+	return result