Honor Num Lock during Remote keyboard capture

Forward numeric keypad identities with Num Lock enabled and preserve held-key pairing across lock changes. Suppress local lock feedback during remote capture so it cannot interrupt incoming speech. Add debug speech and capture-end diagnostics, expand private keypad checks, and repair the suspension probe source list.

Validated affected Go packages, focused remote speech race checks, the private X11 Remote input harness, and a reader build. Live physical keyboard, audible PowerShell speech, Braille, and disconnect-cause verification remain pending; the active reader session was left running.

internal/app/tentacle_remote_speech.go

@@ -86,7 +86,7 @@ func (runtime *tentacleRuntime) start_remote_speech(ctx context.Context, session
 		defer cancel()
 		defer stop()
 		for ctx.Err() == nil {
-			err := run_remote_speech_playback(ctx, speaker, incoming, allow, owner.speech.admit_remote_speech)
+			err := run_remote_speech_playback(ctx, speaker, incoming, allow, owner.speech.admit_remote_speech, runtime.logger)
 			if ctx.Err() != nil || err == nil {
 				return
 			}