refactor: standardize developer text and identifiers in English

speech_to_speech/api/openai_realtime/handlers/session.py

@@ -30,7 +30,7 @@ class SessionHandler(RealtimeBaseHandler):
         """
         s = event.session
 	
-	# Forza il bypass della voce inviata dal browser
+        # Ignore the voice supplied by the browser.
         if hasattr(s, "voice") and s.voice is not None:
             s.voice = None
         elif isinstance(s, dict) and "voice" in s:

speech_to_speech/api/openai_realtime/service.py

@@ -277,11 +277,10 @@ class RealtimeService:
         try:
             return model_cls.model_validate(raw)  # type: ignore[return-value]
         except ValidationError as e:
-            # ── Retrocompatibilità session.update ─────────────────────────────────
-            # Il formato standard OpenAI Realtime GA annida instructions/tools/tool_choice
-            # DENTRO "session": { ... }. Per tollerare anche client che li mandano
-            # alla RADICE (es. bug prima della Fase 2 MCP), ricostruiamo qui il payload
-            # corretto e riproviamo la validazione. Funziona SOLO per session.update.
+            # Backward-compatible session.update parsing.
+            # OpenAI Realtime GA nests instructions/tools/tool_choice in "session".
+            # Accept older clients that send them at the root by rebuilding the
+            # nested payload and retrying validation, only for session.update.
             if event_type == "session.update":
                 try:
                     raw_dict = dict(raw) if not isinstance(raw, dict) else raw
@@ -290,7 +289,7 @@ class RealtimeService:
                         normalized_inner = dict(session_inner)
                     else:
                         normalized_inner = {}
-                    # Promuovi campi noti dalla root → inner se mancanti (fallback flat)
+                    # Promote known root fields into the inner session when missing.
                     SESSION_KNOWN_TOP_LEVEL = (
                         "instructions",
                         "tools",