Add workflow_id to all websocket messages

This commit addresses BE-672 by ensuring all execution-related websocket
messages include the workflow_id field when available.

Changes:
- Added extract_workflow_id() helper function in comfy_execution/jobs.py
  to extract workflow_id from extra_data
- Updated execution.py to include workflow_id in all websocket messages:
  - execution_start
  - execution_cached
  - execution_success
  - execution_error
  - execution_interrupted
  - executing
  - executed (including cached UI)
- Updated main.py to include workflow_id in:
  - progress messages (via hijack_progress hook)
  - final executing message (node=None)
- Updated comfy_execution/progress.py to include workflow_id in:
  - progress_state messages
  - preview image metadata

The workflow_id is extracted from extra_data['extra_pnginfo']['workflow']['id']
and is conditionally included in messages only when present, maintaining
backward compatibility with workflows that don't have this field.

Fixes: BE-672

Co-authored-by: Luke Mino-Altherr <luke-mino-altherr@users.noreply.github.com>

comfy_execution/progress.py

@@ -182,8 +182,11 @@ class WebUIProgressHandler(ProgressHandler):
 
         # Send a combined progress_state message with all node states
         # Include client_id to ensure message is only sent to the initiating client
+        message = {"prompt_id": prompt_id, "nodes": active_nodes}
+        if self.registry.workflow_id is not None:
+            message["workflow_id"] = self.registry.workflow_id
         self.server_instance.send_sync(
-            "progress_state", {"prompt_id": prompt_id, "nodes": active_nodes}, self.server_instance.client_id
+            "progress_state", message, self.server_instance.client_id
         )
 
     @override
@@ -223,6 +226,8 @@ class WebUIProgressHandler(ProgressHandler):
                     ),
                     "real_node_id": self.registry.dynprompt.get_real_node_id(node_id),
                 }
+                if self.registry.workflow_id is not None:
+                    metadata["workflow_id"] = self.registry.workflow_id
                 self.server_instance.send_sync(
                     BinaryEventTypes.PREVIEW_IMAGE_WITH_METADATA,
                     (image, metadata),
@@ -240,9 +245,10 @@ class ProgressRegistry:
     Registry that maintains node progress state and notifies registered handlers.
     """
 
-    def __init__(self, prompt_id: str, dynprompt: "DynamicPrompt"):
+    def __init__(self, prompt_id: str, dynprompt: "DynamicPrompt", workflow_id: Optional[str] = None):
         self.prompt_id = prompt_id
         self.dynprompt = dynprompt
+        self.workflow_id = workflow_id
         self.nodes: Dict[str, NodeProgressState] = {}
         self.handlers: Dict[str, ProgressHandler] = {}
 
@@ -322,7 +328,7 @@ class ProgressRegistry:
 # Global registry instance
 global_progress_registry: ProgressRegistry | None = None
 
-def reset_progress_state(prompt_id: str, dynprompt: "DynamicPrompt") -> None:
+def reset_progress_state(prompt_id: str, dynprompt: "DynamicPrompt", workflow_id: Optional[str] = None) -> None:
     global global_progress_registry
 
     # Reset existing handlers if registry exists
@@ -330,7 +336,7 @@ def reset_progress_state(prompt_id: str, dynprompt: "DynamicPrompt") -> None:
         global_progress_registry.reset_handlers()
 
     # Create new registry
-    global_progress_registry = ProgressRegistry(prompt_id, dynprompt)
+    global_progress_registry = ProgressRegistry(prompt_id, dynprompt, workflow_id)
 
 
 def add_progress_handler(handler: ProgressHandler) -> None: