Fixed mat assignment rules to be db agnostic with comma delimited strings and upgraded test env db to mariadb 10.10 to match production.

app/models/mat_assignment_rule.rb

@@ -2,11 +2,28 @@ class MatAssignmentRule < ApplicationRecord
   belongs_to :mat
   belongs_to :tournament
 
-  # Ensure default values for JSON fields
-  # because mysql doesn't allow this
-  after_initialize do
-    self.weight_classes ||= []
-    self.bracket_positions ||= []
-    self.rounds ||= []
+  # Convert comma-separated values to arrays
+  def weight_classes
+    (super || "").split(",").map(&:to_i)
+  end
+
+  def weight_classes=(value)
+    super(value.is_a?(Array) ? value.join(",") : value)
+  end
+
+  def bracket_positions
+    (super || "").split(",")
+  end
+
+  def bracket_positions=(value)
+    super(value.is_a?(Array) ? value.join(",") : value)
+  end
+
+  def rounds
+    (super || "").split(",").map(&:to_i)
+  end
+
+  def rounds=(value)
+    super(value.is_a?(Array) ? value.join(",") : value)
   end
 end