Low-level Backup/Restore/Unbrick toolkit for Mi A1

A Windows (only) toolkit for making a full backup/restore of all Mi A1 partitions to/from your PC.

Utilizes EMMCDL in Qualcomm EDL mode - only needs fast boot access (unlocked BL) or test point (for bricked devices, maybe locked ones too - not sure)
Backups create a rawprogram0.xml file which could also be restorable in MiFlash if you choose (untested - not part of toolkit goal).
See the FAQ at the bottom for details about how to use EDL mode.

Usage

The toolkit is pretty self-explanatory. But first, you need to select which partitions you want to back up with option 1. Two partition lists are already included:

partition_list.all.txt - this list selects all partitions that exist on the Mi A1. Note that backing up system(_a/_b) and especially user data will take a VERY LONG TIME. Also, note that the backup images are NOT compressed; so expect to have 32GB space free for example (if you have a 32GB device).
partition_list.skip-systems-and-userdata.txt - this will backup all partitions except system(_a/_b) and user data. More useful, since we backup system and user data in TWRP anyway. All the other firmware partitions come to only about 500MB.

Once you select the list you want to use, you can run the backup with 2 - just enter a folder name and it'll go there.

Restore does not require a partition list to be loaded; since the partition table is stored inside the backup as rawpartition0.xml. You can manually edit this file if you want to selectively restore partitions - just delete the whole line of partitions you don't want to restore. Note that changing any of these values will NOT repartition the device - you'll only corrupt your partition table if you do this.

Well, I guess that's it, I will update this guide after feedback (it's a bit rough, I am kind of rushing lol).

Special thanks to @emuzychenko for his batch script wizardry which this is mostly based on. You can see his original tool and scripts here. I just re-wrote it all to be more user-friendly and convenient for me and others.