fix: upgrade ddtrace to v3+ for Python 3.13 profiling compatibility

ddtrace v2.x profiling stack collector references _PyThread_CurrentExceptions
which was removed in CPython 3.13. This causes profiling to silently fail
(tracing works but profiles are never sent to Datadog).

Upgrading to ddtrace>=3,<5 fixes Python 3.13 profiling support.

Co-Authored-By: gl_anatolii.yatsuk <gl_anatolii.yatsuk@airbyte.io>

Author: devin-ai-integration[bot]

Dockerfile

@@ -22,7 +22,7 @@ RUN pip install dist/*.whl
 
 # Install ddtrace for Datadog APM and memory profiling support.
 # This is a no-op unless DD_PROFILING_ENABLED or similar env vars are set at runtime.
-RUN pip install "ddtrace>=2.16,<3"
+RUN pip install "ddtrace>=3,<5"
 
 # Recreate the original structure
 RUN mkdir -p source_declarative_manifest \