[feature] Add last_error_type and last_error_desc attributes to partitions

[xaf]

This allows to handle errors as triggers or other in Home Assistant, and keep track of errors reported by the panel.

Fixes #56

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
apps/qolsysgw
gateway.py	158	31	80%	95–96, 131–154, 162, 187–188, 216–217, 226–227, 236–237, 243, 263–264
apps/qolsysgw/mqtt
exceptions.py	8	0	100%
listener.py	53	8	85%	42–44, 68–70, 74–75
updater.py	227	14	94%	184, 187, 214, 222, 227, 232, 236, 241, 273, 335, 340, 417, 459, 507
utils.py	20	0	100%
apps/qolsysgw/qolsys
actions.py	48	2	96%	24, 34
config.py	58	11	81%	58–59, 61, 65, 70, 85–97, 123
control.py	142	7	95%	39, 47, 51, 58, 65, 81, 88
events.py	232	21	91%	60, 65, 93, 97, 123–124, 156, 160, 183, 194, 201, 225, 241, 255, 268–270, 315, 347, 359, 404
exceptions.py	20	0	100%
observable.py	17	3	82%	13, 17–18
partition.py	105	7	93%	126–130, 136–140, 143
sensors.py	179	22	88%	51–72, 116, 120, 126, 155, 159, 164, 179, 183
socket.py	93	19	80%	36, 43, 52–54, 83–84, 103–105, 109–110, 114–116, 126–127, 133–134
state.py	50	3	94%	18, 52, 60
utils.py	32	4	88%	10, 13, 19–20
TOTAL	1442	152	89%

Tests	Skipped	Failures	Errors	Time
97	0 💤	0 ❌	0 🔥	25.318s ⏱️