fix(dfu): classify disconnects from failed Legacy writes #8012

Job	Run time
check-changes	9s
Check Store Metadata	5s
verify-check-changes-filter	5s
validate-and-build / setup	7s
validate-and-build / rb-check	-1s
validate-and-build / lint-check	10m 14s
validate-and-build / screenshot-check	2m 25s
validate-and-build / android-check	2m 51s
validate-and-build / test-shards (shard-feature, :feature:connections:allTests :feature:firmware:allTests :feature:int...	6m 56s
validate-and-build / test-shards (shard-app, :androidApp:testFdroidDebugUnitTest :androidApp:testGoogleDebugUnitTest :...	6m 2s
validate-and-build / test-shards (shard-core, :core:ble:allTests :core:common:allTests :core:data:allTests :core:datab...	11m 56s
validate-and-build / Generate Flatpak Sources (${{ matrix.os }})	-1s
validate-and-build / Build Desktop Debug (${{ matrix.os }})	-1s
Check Workflow Status	2s
	40m 49s

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