Fix matcher devices stuck in CHANGING state after instantation

See merge request !110

manager: Return early from pipeline instantation if any device failed to instantiate

See merge request !109

Get secrets file path from configuration

See merge request !98

Saturation monitor addon with own output channel

See merge request !104

Refactoring of arbiter to add flexibility and to allow reuse kernels

See merge request !68

pnCCD and ePix: Fix input data shape if DAQ sends something funny

See merge request !107

AGIPD: handle bad pixel constants with three dimensions with more cells than requested

See merge request !106

Wait for all assemblers to be ACTIVE before sending geometry

See merge request !105

Hotfixes from BUD summer 2024

See merge request !101

Discovered by Thomas K

Add rudimentary test of some generated scenes and their keys

See merge request !89

Correction runners as friends

See merge request !90

Correction runners get more responsibility for handling reconfiguration subhashes. Also, they don't get killed and replaced, but can respond to more changes, including number of frames.
Previews are overhauled, with more code moved to preview_utils and each individual preview output (name of OutputChannels change) has its own preview reduction settings.
More tests added all around.

Add compatibility with new pclayer release

See merge request !80

Add/saturation monitor

See merge request !94

Ping managed devices to check whether they're still alive

Closes #39

See merge request !92

Fix getting hostname for error messages about device servers config

See merge request !93