When an exception happens within the session processor loop, record a… (#4638)

…nd move on

## What type of PR is this? (check all applicable)

- [ ] Refactor
- [ ] Feature
- [ ] Bug Fix
- [ ] Optimization
- [ ] Documentation Update
- [ ] Community Node Submission


## Have you discussed this change with the InvokeAI team?
- [ ] Yes
- [ ] No, because:

      
## Have you updated all relevant documentation?
- [ ] Yes
- [ ] No


## Description


## Related Tickets & Documents

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- Related Issue #
- Closes #

## QA Instructions, Screenshots, Recordings

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## Added/updated tests?

- [ ] Yes
- [ ] No : _please replace this line with details on why tests
      have not been included_

## [optional] Are there any post deployment tasks we need to perform?

invokeai/app/services/session_processor/session_processor_default.py

@@ -92,7 +92,7 @@ class DefaultSessionProcessor(SessionProcessorBase):
             self.__invoker.services.logger
             while not stop_event.is_set():
                 poll_now_event.clear()
-
+                try:
                     # do not dequeue if there is already a session running
                     if self.__queue_item is None and resume_event.is_set():
                         queue_item = self.__invoker.services.session_queue.dequeue()
@@ -116,6 +116,10 @@ class DefaultSessionProcessor(SessionProcessorBase):
                         continue
                 except Exception as e:
                     self.__invoker.services.logger.error(f"Error in session processor: {e}")
+                    poll_now_event.wait(POLLING_INTERVAL)
+                    continue
+        except Exception as e:
+            self.__invoker.services.logger.error(f"Fatal Error in session processor: {e}")
             pass
         finally:
             stop_event.clear()