Index: Schedule automatic library rescans

[lastzero]

As an admin who wants their library to be periodically checked for changes, I want PhotoPrism to provide a config option for scheduling automatic library rescans, so I don't need to set up and maintain an external job runner that e.g. triggers rescans with the CLI commands that PhotoPrism provides.

Related Issues:

• Settings: Add admin panel for background job scheduling #2495
• Index: Filesystem watcher for auto indexing independent from WebDAV #2608
• Backups: Schedule automatic index database and album backups #4243

[lastzero]

This has already been implemented as part of the changes for #4243 and can be tested with our latest development preview build available on Docker Hub. The relevant config options are:

Environment	CLI Flag	Default	Description
PHOTOPRISM_INDEX_WORKERS, PHOTOPRISM_WORKERS	--index-workers	4	maximum NUMBER of indexing workers, default depends on the number of physical cores
PHOTOPRISM_INDEX_SCHEDULE	--index-schedule		indexing SCHEDULE in cron format, e.g. "0 */3 * * *" for every 3 hours (leave empty to disable)
PHOTOPRISM_WAKEUP_INTERVAL	--wakeup-interval	15m0s	TIME between facial recognition, file sync, and metadata worker runs (1-86400s)
PHOTOPRISM_AUTO_INDEX	--auto-index	300	delay before automatically indexing files in SECONDS (-1 to disable) when uploading files via WebDAV
PHOTOPRISM_AUTO_IMPORT	--auto-import	180	delay before automatically importing files in SECONDS (-1 to disable) when uploading files via WebDAV