Refactor: DistributedJobManager with pub/sub status change notifications (#25)

* Add pubsub to render_queue and base_worker

* Refactor: Convert ZeroconfServer to Singleton with Class Methods

* New API for subjob servers to notify parent job servers of status changes

* Refactor: Move all subjob related methods to distributed_job_manager.py

* Rewrite for wait_for_subjobs

* Fix: DistributedJobManager.find_available_servers() takes 1 positional argument but 3 were given

* DistributedJobManager should now notify / be notified abotu background job changes

* Fix the make_ready api. Change children keyname to be id@hostname so it can be unique

* Fixes

* Image sequence to movie needs to find the actual start frame

* Fix: subjob_status_change did not return a valid response

* Fix client renderer selection

* Small fix for subjob status checking

* Fix issue with divide_frames_equally

* Fix issue where downloads were not occurring

* Fix issue where old status was being reported

* Add docstrings and code cleanup

lib/utilities/misc_helper.py

@@ -86,3 +86,20 @@ def get_time_elapsed(start_time=None, end_time=None):
 
     elapsed_time_string = strfdelta(elapsed_time) if elapsed_time else None
     return elapsed_time_string
+
+
+def get_file_size_human(file_path):
+    size_in_bytes = os.path.getsize(file_path)
+
+    # Convert size to a human readable format
+    if size_in_bytes < 1024:
+        return f"{size_in_bytes} B"
+    elif size_in_bytes < 1024 ** 2:
+        return f"{size_in_bytes / 1024:.2f} KB"
+    elif size_in_bytes < 1024 ** 3:
+        return f"{size_in_bytes / 1024 ** 2:.2f} MB"
+    elif size_in_bytes < 1024 ** 4:
+        return f"{size_in_bytes / 1024 ** 3:.2f} GB"
+    else:
+        return f"{size_in_bytes / 1024 ** 4:.2f} TB"
+