Fix to have stable sorting for end cap artifacts (#6589)

* Fix to have stable sorting for end cap artifacts

* Update output

rust/kcl-lib/tests/intersect_cubes/artifact_graph_flowchart.snap.md

@@ -66,43 +66,43 @@ flowchart LR
   4 ---- 15
   4 <--x 17
   5 --- 24
-  5 x--> 27
+  5 x--> 26
   5 --- 35
   5 --- 42
   6 --- 21
-  6 x--> 26
+  6 x--> 27
   6 --- 31
   6 --- 38
   7 --- 19
-  7 x--> 26
+  7 x--> 27
   7 --- 30
   7 --- 41
   8 --- 25
-  8 x--> 27
+  8 x--> 26
   8 --- 34
   8 --- 44
   9 --- 18
-  9 x--> 26
+  9 x--> 27
   9 --- 33
   9 --- 40
   10 --- 23
-  10 x--> 27
+  10 x--> 26
   10 --- 37
   10 --- 43
   11 --- 22
-  11 x--> 27
+  11 x--> 26
   11 --- 36
   11 --- 45
   12 --- 20
-  12 x--> 26
+  12 x--> 27
   12 --- 32
   12 --- 39
   15 --- 18
   15 --- 19
   15 --- 20
   15 --- 21
-  15 --- 26
-  15 --- 28
+  15 --- 27
+  15 --- 29
   15 --- 30
   15 --- 31
   15 --- 32
@@ -115,8 +115,8 @@ flowchart LR
   16 --- 23
   16 --- 24
   16 --- 25
-  16 --- 27
-  16 --- 29
+  16 --- 26
+  16 --- 28
   16 --- 34
   16 --- 35
   16 --- 36
@@ -149,12 +149,12 @@ flowchart LR
   34 <--x 25
   42 <--x 25
   44 <--x 25
-  30 <--x 28
-  31 <--x 28
-  32 <--x 28
-  33 <--x 28
-  34 <--x 29
-  35 <--x 29
-  36 <--x 29
-  37 <--x 29
+  34 <--x 28
+  35 <--x 28
+  36 <--x 28
+  37 <--x 28
+  30 <--x 29
+  31 <--x 29
+  32 <--x 29
+  33 <--x 29
 ```