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/remote_speech_stream.go

@@ -8,6 +8,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"log/slog"
 	"time"
 
 	"git.stormux.org/storm/cthulhu/internal/tentacle"
@@ -43,7 +44,7 @@ func (err *remoteSpeechStreamError) Unwrap() error { return err.cause }
 // The caller supplies original-lease policy and optional local-output admission.
 func run_remote_speech_playback(ctx context.Context, speaker *configuredSpeaker,
 	incoming <-chan tentacle.RemoteSpeechDelivery, allow func(tentacle.RemoteSpeechDelivery) bool,
-	admit remoteSpeechAdmission) error {
+	admit remoteSpeechAdmission, logger *slog.Logger) error {
 	if speaker == nil || allow == nil {
 		return errors.New("Remote speech playback requires a backend and delivery policy")
 	}
@@ -87,7 +88,17 @@ func run_remote_speech_playback(ctx context.Context, speaker *configuredSpeaker,
 		if !allow(delivery) {
 			return errors.New("Remote speech delivery policy changed")
 		}
-		return voice.SpeakUtteranceAndWait(request, utterance)
+		if logger != nil && logger.Enabled(request, slog.LevelDebug) {
+			for _, fragment := range utterance.fragments {
+				logger.DebugContext(request, "delivering remote speech", "utterance", fragment.Text,
+					"characters", fragment.Characters, "language", fragment.Language, "priority", utterance.priority)
+			}
+		}
+		err := voice.SpeakUtteranceAndWait(request, utterance)
+		if err != nil && request.Err() == nil && logger != nil {
+			logger.Debug("remote speech rendering failed", "error", err)
+		}
+		return err
 	})
 }