Fix minor bugs involving model manager handling of model paths (#6024)

* Fix minor bugs involving model manager handling of model paths

- Leave models found in the `autoimport` directory there. Do not move them
  into the `models` hierarchy.
- If model name, type or base is updated and model is in the `models` directory,
  update its path as appropriate.
- On startup during model scanning, if a model's path is a symbolic link, then resolve
  to an absolute path before deciding it is a new model that must be hashed and
  registered. (This prevents needless hashing at startup time).

* fix issue with dropped suffix

---------

Co-authored-by: Lincoln Stein <lstein@gmail.com>

invokeai/app/api/routers/model_manager.py

@@ -21,10 +21,11 @@ from typing_extensions import Annotated
 
 from invokeai.app.services.model_install import ModelInstallJob
 from invokeai.app.services.model_records import (
+    DuplicateModelException,
     InvalidModelException,
+    ModelRecordChanges,
     UnknownModelException,
 )
-from invokeai.app.services.model_records.model_records_base import DuplicateModelException, ModelRecordChanges
 from invokeai.app.util.suppress_output import SuppressOutput
 from invokeai.backend.model_manager.config import (
     AnyModelConfig,
@@ -309,8 +310,10 @@ async def update_model_record(
     """Update a model's config."""
     logger = ApiDependencies.invoker.services.logger
     record_store = ApiDependencies.invoker.services.model_manager.store
+    installer = ApiDependencies.invoker.services.model_manager.install
     try:
-        model_response: AnyModelConfig = record_store.update_model(key, changes=changes)
+        record_store.update_model(key, changes=changes)
+        model_response: AnyModelConfig = installer.sync_model_path(key)
         logger.info(f"Updated model: {key}")
     except UnknownModelException as e:
         raise HTTPException(status_code=404, detail=str(e))