no more float conversion

dynamodb/storage.odin

@@ -1262,10 +1262,9 @@ evaluate_sort_key_condition :: proc(item: Item, skc: ^Sort_Key_Condition) -> boo
 			}
 			return false
 		case .BEGINS_WITH:
-			// BEGINS_WITH on numbers: fall through to string comparison
-			item_str := format_ddb_number(item_num)
-			cond_str := format_ddb_number(cond_num)
-			return strings.has_prefix(item_str, cond_str)
+			// begins_with is not a valid operator for Number sort keys.
+			// DynamoDB rejects this at validation time. Return false.
+			return false
 		}
 		return false
 	}