Toggle main parameters through state attributes

[MarkParker5]

One-way main parameters become toggles. The state attribute is the main parameter, with a two-value default_value cycle. The Hub sends the next value, and the controller sends the matching command:

Cluster	Main parameter	Tap sends
DoorLock	LockState {Locked, Unlocked}	LockDoor / UnlockDoor; NotFullyLocked or Unlatched → Lock
Valve	CurrentState {Closed, Open}	Close / Open; Transitioning → Close
WindowCovering	CurrentPositionLiftPercentage {0, 100}	UpOrOpen / DownOrClose; mid → open
MediaPlayback	CurrentState {Playing, Paused}	Play / Pause; NotPlaying → Play
RvcOperationalState	OperationalState {Running, Paused}	Resume / Pause; docked → Resume
OperationalState	OperationalState {Running, Paused}	Resume / Pause; idle → error, never Start
FanControl	FanMode {Off, On} (written)	Off / On; Low/Medium/High → Off
ClosureControl	MainState, a one-value button	Stop while moving; else MoveTo FullyOpen if fully closed, FullyClosed otherwise

• The state attributes are control: the Hub forwards commands for control parameters only (relay_controller.send_command), so no Hub change is needed
• Fallbacks when a device lacks the attribute or a command: a cover without position keeps UpOrOpen, a player without Pause keeps Play, a vacuum without Pause keeps Resume, and an OperationalState device without Pause/Resume gets no main parameter
• DefaultParams allows a set; requires SDK 0.1.7, which keeps a set default_value through JSON (pulls pydantic 2.14 and zeroconf 0.151.5 into the lock)

Tests first. Local: poe check --ci green, 87 passed, 6 skipped (MVD, macOS).