console: fix login prompt by avoiding oneshot scheduler deadlock

29_activate_console: changed from oneshot back to oneshot_async.
The oneshot type calls child.wait() which blocks the entire init
scheduler. If inputd doesn't drain its control channel promptly,
ControlHandle::write() hangs forever, freezing boot.

30_console: added 'sleep 0.2' before 'exec getty 2' to give
inputd time to process the VT activation before getty opens
/scheme/fbcon/2. Eliminates the race condition without
blocking the init scheduler.

config/redbear-full.toml

@@ -477,7 +477,7 @@ requires_weak = [
 [service]
 cmd = "inputd"
 args = ["-A", "2"]
-type = "oneshot"
+type = "oneshot_async"
 """
 
 [[files]]
@@ -490,8 +490,8 @@ requires_weak = [
 ]
 
 [service]
-cmd = "getty"
-args = ["2"]
+cmd = "sh"
+args = ["-c", "sleep 0.2; exec getty 2"]
 type = "oneshot_async"
 """
 

config/redbear-mini.toml

@@ -504,7 +504,7 @@ requires_weak = ["00_base.target"]
 [service]
 cmd = "inputd"
 args = ["-A", "2"]
-type = "oneshot"
+type = "oneshot_async"
 """
 
 [[files]]
@@ -516,8 +516,8 @@ default_dependencies = false
 requires_weak = ["29_activate_console.service"]
 
 [service]
-cmd = "getty"
-args = ["2"]
+cmd = "sh"
+args = ["-c", "sleep 0.2; exec getty 2"]
 type = "oneshot_async"
 """