fix(realtime): register pipeline streaming/thinking config fields

TestAllFieldsHaveRegistryEntries (core/config/meta) requires every config
field to have a meta registry entry. The four new pipeline fields
(disable_thinking, streaming.{llm,tts,transcription}) had none, failing
tests-linux/tests-apple. Add toggle entries for them.

Also handle the os.Remove return in realtime_speech_test.go to satisfy
errcheck (golangci-lint).

Assisted-by: Claude:claude-opus-4-8 go test, golangci-lint
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

core/config/meta/registry.go

@@ -308,6 +308,34 @@ func DefaultRegistry() map[string]FieldMetaOverride {
 			},
 			Order: 64,
 		},
+		"pipeline.disable_thinking": {
+			Section:     "pipeline",
+			Label:       "Disable Thinking",
+			Description: "Suppress reasoning/thinking output from the pipeline LLM (sets enable_thinking=false on the underlying model). Use for models that emit <think> blocks you don't want spoken or streamed back to the realtime client.",
+			Component:   "toggle",
+			Order:       65,
+		},
+		"pipeline.streaming.llm": {
+			Section:     "pipeline",
+			Label:       "Stream LLM",
+			Description: "Stream LLM tokens to the realtime client as they are generated instead of waiting for the full response. Emits incremental response.output_audio_transcript.delta / text deltas.",
+			Component:   "toggle",
+			Order:       66,
+		},
+		"pipeline.streaming.tts": {
+			Section:     "pipeline",
+			Label:       "Stream TTS",
+			Description: "Stream synthesized audio chunks to the realtime client as they are produced (requires a TTS backend that implements TTSStream). Falls back to unary synthesis otherwise.",
+			Component:   "toggle",
+			Order:       67,
+		},
+		"pipeline.streaming.transcription": {
+			Section:     "pipeline",
+			Label:       "Stream Transcription",
+			Description: "Stream partial transcription text to the realtime client as the STT backend produces it (requires a transcription backend that implements AudioTranscriptionStream). Falls back to unary transcription otherwise.",
+			Component:   "toggle",
+			Order:       68,
+		},
 
 		// --- Functions ---
 		"function.grammar.parallel_calls": {

core/http/endpoints/openai/realtime_speech_test.go

@@ -47,7 +47,7 @@ var _ = Describe("emitSpeech", func() {
 		// A minimal real WAV file for the unary TTS path to read + parse.
 		f, err := os.CreateTemp("", "emit-*.wav")
 		Expect(err).ToNot(HaveOccurred())
-		defer os.Remove(f.Name())
+		defer func() { _ = os.Remove(f.Name()) }()
 		pcm := make([]byte, 320) // 160 samples of silence
 		hdr := laudio.NewWAVHeader(uint32(len(pcm)))
 		Expect(hdr.Write(f)).To(Succeed())