chore(server): Store generated files (thumbnails, encoded video) in subdirectories (#4112)

* save thumbnails in subdirectories

* migration job, migrate assets and face thumbnails

* fix tests

* directory depth of two instead of three

* cleanup empty dirs after migration

* clean up empty dirs after migration, migrate people without assetId

* add job card for new migration job

* fix removeEmptyDirs race condition because of missing await

* cleanup empty directories after asset deletion

* move ensurePath to storage core

* rename jobs

* remove unnecessary property of IEntityJob

* use updated person getById, minor refactoring

* ensure that directory cleanup doesn't interfere with migration

* better description for job in ui

* fix remove directories when migration is done

* cleanup empty folders at start of migration

* fix: actually persist concurrency setting

* add comment explaining regex

* chore: cleanup

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

cli/src/api/open-api/api.ts

@@ -307,6 +307,12 @@ export interface AllJobStatusResponseDto {
      * @memberof AllJobStatusResponseDto
      */
     'metadataExtraction': JobStatusDto;
+    /**
+     * 
+     * @type {JobStatusDto}
+     * @memberof AllJobStatusResponseDto
+     */
+    'migration': JobStatusDto;
     /**
      * 
      * @type {JobStatusDto}
@@ -1779,6 +1785,7 @@ export const JobName = {
     ClipEncoding: 'clipEncoding',
     BackgroundTask: 'backgroundTask',
     StorageTemplateMigration: 'storageTemplateMigration',
+    Migration: 'migration',
     Search: 'search',
     Sidecar: 'sidecar',
     Library: 'library'
@@ -3240,6 +3247,12 @@ export interface SystemConfigJobDto {
      * @memberof SystemConfigJobDto
      */
     'metadataExtraction': JobSettingsDto;
+    /**
+     * 
+     * @type {JobSettingsDto}
+     * @memberof SystemConfigJobDto
+     */
+    'migration': JobSettingsDto;
     /**
      * 
      * @type {JobSettingsDto}