The event allows tools to listen and connect to the original DDS port.

`jsonDecode` decodes lists as `List<Object?>`, so the cast to `List<Object>` fails at runtime in sound null safety mode.

The daemon ignores all device discovery that is not a PollingDeviceDiscovery. Make ProxiedDevices a PollingDeviceDiscovery so that it can be used in flutter daemon.

Note that there is a TODO item added in the test, which I intend to attempt fixing in a subsequent PR.

Debounce the proxied connection over proxied devices.

Allow daemon to start DDS remotely when proxied devices are used.

Use DeviceDiscoveryFilter correctly in ProxiedDevices.

Add backward compatibility in proxied_devices.

Update device filtering and introduce isConnected and connectionInterface

This reverts commit 275ab9c6.

Revert "Reland "Remove references to Observatory (#118577)""

This reverts commit 298d8c76.

This reverts commit 2df140f4.

* wip run_local_linter.dart

* get run_local_linter.dart working

* slow working implementation

* speed up run_local_linter.dart

* fix run_local_linter.dart

* remove catchError

* another fix

* fix another

* fix

* more fixes

* fix moar

* fix moar

* fix

* finish

* fix tests

* clean up further

* code review

* delete run_local_linter.dart

Observatory is being deprecated for Dart 3.0 so it should no longer be
referenced in tooling messaging / flags.

See https://github.com/dart-lang/sdk/issues/50233

* remove all body_might_complete_normally_catch_error ignores

* add a test

Also allow daemon commands to pass binary streams