fix: clamp ElevenLabs speed and adjust russian phrasing

.env.example

@@ -38,7 +38,7 @@ ELEVENLABS_TTS_VOICE_ID=
 ELEVENLABS_TTS_MODEL_ID=eleven_flash_v2_5
 ELEVENLABS_TTS_LANGUAGE_CODE=ru
 ELEVENLABS_TTS_OUTPUT_FORMAT=pcm_16000
-ELEVENLABS_TTS_SPEED=1.35
+ELEVENLABS_TTS_SPEED=1.2
 ELEVENLABS_STT_MODEL_ID=scribe_v2
 ELEVENLABS_STT_REALTIME_MODEL_ID=scribe_v2_realtime
 ELEVENLABS_STT_LANGUAGE_CODE=ru

providers/tts.py

@@ -53,6 +53,18 @@ def _parse_chunk_schedule(raw: str | None) -> list[int]:
     return values or [80, 120, 160, 220]
 
 
+def _max_min(value: float, low: float, high: float) -> float:
+    try:
+        v = float(value)
+    except Exception:
+        v = low
+    if v < low:
+        return low
+    if v > high:
+        return high
+    return v
+
+
 def _sample_rate_from_pcm_format(output_format: str) -> int | None:
     normalized = str(output_format or "").strip().lower()
     if not normalized.startswith("pcm_"):
@@ -131,7 +143,7 @@ class ElevenLabsTTS(BaseTTS):
         self._voice_settings = {
             "stability": self._read_float_env("ELEVENLABS_TTS_STABILITY", 0.5),
             "similarity_boost": self._read_float_env("ELEVENLABS_TTS_SIMILARITY_BOOST", 0.75),
-            "speed": self._read_float_env("ELEVENLABS_TTS_SPEED", 1.15),
+            _max_min(self._read_float_env("ELEVENLABS_TTS_SPEED", 1.15), 0.7, 1.2),
             "use_speaker_boost": self._read_bool_env("ELEVENLABS_TTS_USE_SPEAKER_BOOST", True),
         }
         LOGGER.info(