build(pyproject.toml): update OpenTelemetry dependencies for Python

Author: teocns

pyproject.toml

@@ -78,7 +78,15 @@ compile-bytecode = true  # Enable bytecode compilation for better performance
 default-groups = ["test", "dev"]  # Default groups to install for development
 constraint-dependencies = [
     "pydantic>=2.8.0; python_version>='3.13'",  # Ensure Python 3.13 compatibility
-    "typing-extensions; python_version>='3.13'"  # Required for Pydantic with Python 3.13
+    "typing-extensions; python_version>='3.13'",  # Required for Pydantic with Python 3.13
+    # For Python 3.9, use original OpenTelemetry versions
+    "opentelemetry-api==1.22.0; python_version<'3.10'",
+    "opentelemetry-sdk==1.22.0; python_version<'3.10'",
+    "opentelemetry-exporter-otlp-proto-http==1.22.0; python_version<'3.10'",
+    # For Python ≥3.10 (where autogen-core might be present), use newer versions
+    "opentelemetry-api>=1.27.0; python_version>='3.10'",
+    "opentelemetry-sdk>=1.27.0; python_version>='3.10'",
+    "opentelemetry-exporter-otlp-proto-http>=1.27.0; python_version>='3.10'"
 ]
 
 [tool.autopep8]