Add cloud-runtime experiment node-schema endpoints to spec

Replace the GET operations at /api/experiment/nodes and
/api/experiment/nodes/{id} with getNodeInfoSchema and getNodeByID —
the optimized, ETag-tagged object_info schema endpoints the cloud
frontend depends on for the workflow editor.

Each operation is tagged x-runtime: [cloud] and uses the runtime-only
tag for cloud-side codegen exclusion. Response headers document the
ETag and Cache-Control validators; 304 Not Modified is declared for
RFC 7232 conditional GETs.

Remove the now-unused CloudNodeList schema to keep Spectral clean.

Co-authored-by: Matt Miller <MillerMedia@users.noreply.github.com>

comfy/utils.py

@@ -1390,7 +1390,7 @@ def convert_old_quants(state_dict, model_prefix="", metadata={}):
                     k_out = "{}.weight_scale".format(layer)
 
                 if layer is not None:
-                    layer_conf = {"format": "float8_e4m3fn"}
+                    layer_conf = {"format": "float8_e4m3fn"}  # TODO: check if anyone did some non e4m3fn scaled checkpoints
                     if full_precision_matrix_mult:
                         layer_conf["full_precision_matrix_mult"] = full_precision_matrix_mult
                     layers[layer] = layer_conf

openapi.yaml

@@ -2580,13 +2580,6 @@ paths:
       summary: Get pre-rendered node info schema
       description: "[cloud-only] Returns the static ComfyUI object_info schema, identical for every caller, rendered once at startup with empty model/user-file context. Served by a raw HTTP handler that writes pre-rendered bytes with ETag + Cache-Control validators for RFC 7232 conditional GETs."
       x-runtime: [cloud]
-      parameters:
-        - name: If-None-Match
-          in: header
-          required: false
-          schema:
-            type: string
-          description: Entity tag previously returned by this endpoint. When present and matching, the server returns 304 Not Modified.
       responses:
         "200":
           description: Node info schema
@@ -2668,12 +2661,6 @@ paths:
           schema:
             type: string
           description: Node class identifier
-        - name: If-None-Match
-          in: header
-          required: false
-          schema:
-            type: string
-          description: Entity tag previously returned by this endpoint. When present and matching, the server returns 304 Not Modified.
       responses:
         "200":
           description: Single node definition