chore(audio): deprecate ResampyResampler in favor of SOXR resamplers

Emits a DeprecationWarning on instantiation. ResampyResampler will be
removed in Pipecat 2.0 along with the default resampy and numba
dependencies.

tests/test_resampy_resampler.py

@@ -0,0 +1,17 @@
+#
+# Copyright (c) 2024-2026, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+"""Tests for the deprecated resampy resampler."""
+
+import pytest
+
+from pipecat.audio.resamplers.resampy_resampler import ResampyResampler
+
+
+def test_resampy_resampler_emits_deprecation_warning():
+    """Test that instantiating ResampyResampler emits a DeprecationWarning."""
+    with pytest.warns(DeprecationWarning, match="ResampyResampler is deprecated"):
+        ResampyResampler()