Fix GradiumTTSService to reuse context IDs across multiple run_tts calls and prevent the parent class from pushing text frames.

src/pipecat/services/gradium/tts.py

@@ -6,6 +6,7 @@
 
 import base64
 import json
+import uuid
 from typing import Any, AsyncGenerator, Mapping, Optional
 
 from loguru import logger
@@ -74,6 +75,7 @@ class GradiumTTSService(AudioContextWordTTSService):
         """
         super().__init__(
             push_stop_frames=True,
+            push_text_frames=False,
             pause_frame_processing=True,
             sample_rate=SAMPLE_RATE,
             **kwargs,
@@ -304,6 +306,20 @@ class GradiumTTSService(AudioContextWordTTSService):
                 await self.stop_all_metrics()
                 await self.push_error(error_msg=f"Error: {msg.get('message', msg)}")
 
+    def create_context_id(self) -> str:
+        """Generate a unique context ID for a TTS request in case we don't have one already in progress.
+
+        Returns:
+            A unique string identifier for the TTS context.
+        """
+        # If a context ID does not exist, create a new one.
+        # If an ID exists, continue using the current ID.
+        # When interruptions happens, user speech results in
+        # an interruption, which resets the context ID.
+        if not self._context_id:
+            return str(uuid.uuid4())
+        return self._context_id
+
     @traced_tts
     async def run_tts(self, text: str, context_id: str) -> AsyncGenerator[Frame, None]:
         """Generate speech from text using Gradium's streaming API.