- remove dependency on having access to a `node` during emits, would need a bit of additional args passed through the system and I don't think its necessary at this point. this also allowed us to drop an extraneous fetching/parsing of the session from db.
- provide the invocation context to all `get_model()` calls, so the events are able to be emitted
- test all model loading events in the app and confirm socket events are received
- update controlnet state to use object format for model
- update model-parsing helper functions to log errors
- update nodes components, types and state
- remove controlnets from state when models are loaded and the controlnet's model is not available
# Multiple enhancements to model manager REACT API
1. add a `/sync` route for synchronizing the in-memory model lists to
models.yaml, the models directory, and the autoimport directories.
2. added optional destination directories to convert_model and
merge_model operations.
3. added a `/ckpt_confs` route for retrieving known legacy checkpoint
configuration files.
4. added a `/search` route for finding all models in a directory located
in the server filesystem
5. added a `/add` route for manual addition of a local models
6. added a `/rename` route for renaming and/or rebasing models
7. changed the path of the `import_model` route to `/import`
# Slightly annoying detail:
When adding a model manually using `/add`, the body JSON must exactly
match one of the model configurations returned by `list_models` (i.e.
there is no defaulting of fields). This includes the `error` field,
which should be set to "null".
