Add server-side ELO ratings

scripts/autoload/block_session_service.gd

@@ -130,6 +130,29 @@ func submit_core_attempt(choice_id: String, eliminated: Array, flagged: bool) ->
 	}
 
 
+func skip_core_question(eliminated: Array, flagged: bool) -> Dictionary:
+	var question := get_current_question()
+	if question.is_empty():
+		return {}
+
+	var answer := {
+		"question": question.duplicate(true),
+		"selected_choice_id": "",
+		"is_correct": false,
+		"is_skip": true,
+		"eliminated_choice_ids": eliminated.duplicate(),
+		"flagged": flagged,
+		"elapsed_seconds": get_current_elapsed_seconds(),
+		"target_seconds": core_current_target_seconds
+	}
+	answers[current_index] = answer
+	ProfileService.record_wrong_attempt(question)
+	_apply_core_wrong_penalty(answer)
+	core_target_seconds = min(CORE_MAX_TARGET_SECONDS, core_target_seconds * 1.05)
+	session_changed.emit()
+	return answer
+
+
 func move_previous() -> bool:
 	if current_index > 0:
 		current_index -= 1
@@ -207,6 +230,15 @@ func update_question_choice_percentages(question_id: String, percentages: Dictio
 			break
 
 
+func update_question_elo(question_id: String, question_elo: int) -> void:
+	for index in range(active_questions.size()):
+		var question: Dictionary = active_questions[index]
+		if str(question.get("id", "")) == question_id:
+			question["question_elo"] = question_elo
+			active_questions[index] = question
+			break
+
+
 func advance_core_question() -> bool:
 	var question := _draw_core_question()
 	if question.is_empty():