Merge branch 'sas' into 'master'

core: add index on folder and sas properties of SithFile to speed up SAS

See merge request !231
2 jobs for master in 29 minutes and 37 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #2663
black

00:01:54

passed #2662
test

00:29:37

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