voice_agent: NemoSTTService's default model is misspelled ('nnvidia'), silently defaulting has_turn_taking to False

Describe the bug

NemoSTTService's default model value is misspelled, which silently defaults has_turn_taking to False for the one model it is supposed to auto-detect.

nemo/agents/voice_agent/pipecat/services/nemo/stt.py:41 defines the only recognized EOU model:

ASR_EOU_MODELS = ["nvidia/parakeet_realtime_eou_120m-v1"]

but the constructor's default at stt.py:74 is spelled with a double "n":

model: Optional[str] = "nnvidia/parakeet_realtime_eou_120m-v1",

__init__ auto-detects turn taking from membership in that list:

if has_turn_taking is None:
    has_turn_taking = True if model in ASR_EOU_MODELS else False

Because the default string doesn't match, NemoSTTService() constructed without an explicit model= override gets has_turn_taking=False, and _load_model() goes on to request the nonexistent model id "nnvidia/parakeet_realtime_eou_120m-v1". NemoStreamingASRService's own default (streaming_asr.py:45) and the shipped examples/voice_agent/server/server_configs/default.yaml:20 both use the correctly spelled "nvidia/..." id, so only this one default is affected.

Steps/Code to reproduce bug

from nemo.agents.voice_agent.pipecat.services.nemo.stt import NemoSTTService, ASR_EOU_MODELS

print(ASR_EOU_MODELS)
# ['nvidia/parakeet_realtime_eou_120m-v1']

svc = NemoSTTService()  # no explicit model= override
print(svc._model_name)
# 'nnvidia/parakeet_realtime_eou_120m-v1'
print(svc._model_name in ASR_EOU_MODELS)
# False
print(svc._has_turn_taking)
# False (should be True)

Expected behavior

NemoSTTService()'s out-of-the-box default should resolve to the one supported EOU model and set has_turn_taking=True, matching NemoStreamingASRService's default and the shipped server config.

Environment overview

• Environment location: bare metal
• Method of NeMo install: from source, pip install -e .

Environment details

• Ubuntu 24.04.4 LTS · Python 3.12.3