[Feature] extend documentation on https://immich.app/docs/administration/jobs

The feature

contains only the screenshot of what I can see in the GUI.
I would like to be documented, what are the different jobs doing. This would help to correct use different jobs.

EXTRACT METADATA
Extract metadata information from each asset, such as GPS and resolution
• does it check default and external libraries?
• does it check only new assets, or does it check also changed assets?
• what happens, when sidecare metadata exists?
• ...?

LIBRARY
Perform library tasks
• what kind of tasks are performed?

SIDECAR METADATA
Discover or synchronize sidecar metadata from the filesystem
• how this is related to "EXTRACT METADATA"?
• does it check default and external libraries?
• does it check only new assets, or does it check also changed assets?

and so on.

Platform

• Server
• Web
• Mobile