Revert to CheckpointLoaderSimple to fix link errors

- Go back to CheckpointLoaderSimple which provides MODEL, CLIP, VAE outputs
- Remove separate UNETLoader, CLIPLoader, VAELoader that were causing link issues
- Fix link 3 to connect CheckpointLoaderSimple CLIP output to ConceptAttentionNode
- VAE is included but not used (ConceptAttention works on original images, not latents)
- This should resolve the 'origin(2).outputs[1].links does NOT contain it' error

example_workflow.json

@@ -1,5 +1,5 @@
 {
-  "last_node_id": 12,
+  "last_node_id": 10,
   "last_link_id": 11,
   "nodes": [
     {
@@ -18,44 +18,18 @@
     },
     {
       "id": 2,
-      "type": "UNETLoader",
-      "pos": [100, 400],
-      "size": {"0": 315, "1": 58},
+      "type": "CheckpointLoaderSimple",
+      "pos": [100, 500],
+      "size": {"0": 315, "1": 98},
       "flags": {},
       "order": 1,
       "mode": 0,
       "outputs": [
-        {"name": "MODEL", "type": "MODEL", "links": [2], "slot_index": 0}
+        {"name": "MODEL", "type": "MODEL", "links": [2], "slot_index": 0},
+        {"name": "CLIP", "type": "CLIP", "links": [3], "slot_index": 1},
+        {"name": "VAE", "type": "VAE", "links": null, "slot_index": 2}
       ],
-      "properties": {"Node name for S&R": "UNETLoader"},
-      "widgets_values": ["flux1-dev.safetensors"]
-    },
-    {
-      "id": 11,
-      "type": "CLIPLoader",
-      "pos": [100, 500],
-      "size": {"0": 315, "1": 58},
-      "flags": {},
-      "order": 2,
-      "mode": 0,
-      "outputs": [
-        {"name": "CLIP", "type": "CLIP", "links": [3], "slot_index": 0}
-      ],
-      "properties": {"Node name for S&R": "CLIPLoader"},
-      "widgets_values": ["flux1-dev.safetensors", "stable_diffusion"]
-    },
-    {
-      "id": 12,
-      "type": "VAELoader",
-      "pos": [100, 600],
-      "size": {"0": 315, "1": 58},
-      "flags": {},
-      "order": 3,
-      "mode": 0,
-      "outputs": [
-        {"name": "VAE", "type": "VAE", "links": null, "slot_index": 0}
-      ],
-      "properties": {"Node name for S&R": "VAELoader"},
+      "properties": {"Node name for S&R": "CheckpointLoaderSimple"},
       "widgets_values": ["flux1-dev.safetensors"]
     },
     {
@@ -197,7 +171,7 @@
   "links": [
     [1, 1, 0, 3, 2, "IMAGE"],
     [2, 2, 0, 3, 0, "MODEL"],
-    [3, 11, 0, 3, 1, "CLIP"],
+    [3, 2, 1, 3, 1, "CLIP"],
     [4, 3, 0, 4, 0, "CONCEPT_MAPS"],
     [5, 3, 0, 5, 0, "CONCEPT_MAPS"],
     [6, 3, 1, 7, 0, "IMAGE"],