## Summary
Adds a branded local `NodeId` helper and starts separating local node
identity from serialized workflow IDs.
## Changes
- **What**: Adds central `NodeId` parsing/branding helpers, migrates
nearby widget identity types, keeps queue results at the serialized
boundary, and removes misleading workflow `NodeId` usage from execution
error maps.
## Review Focus
Check that the first migration slice keeps serialized/API IDs as raw
`number | string` while local UI/store IDs use the branded string type.
## Caveat
`SUBGRAPH_INPUT_ID` and `SUBGRAPH_OUTPUT_ID` are now branded local
`NodeId` string values internally instead of numeric sentinels.
Reviewers should double-check extension compatibility for callers that
import `Constants` and compare those values numerically.
## Screenshots (if applicable)
N/A
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Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: AustinMroz <austin@comfy.org>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* docs: Clarify extension terminology and dev server limitations
* docs: removed unecessary callout to extension docs in main readme, in favor of the contributions.md
* docs: remove key points
* docs: change docs structure for better semantics and extensibility
* docs: add warning emoji
* docs: remove mention of 3D core extensions
* docs: add feedback in
