Python: follow on work on OpenAI (#169)

* updated openai, fcc works, with sample

* reduced files in openai

python/packages/main/agent_framework/telemetry.py

@@ -0,0 +1,46 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+import os
+from importlib.metadata import PackageNotFoundError, version
+from typing import Any, Final
+
+try:
+    version_info = version("agent-framework")
+except PackageNotFoundError:
+    version_info = "dev"
+
+# Note that if this environment variable does not exist, telemetry is enabled.
+TELEMETRY_DISABLED_ENV_VAR = "AZURE_TELEMETRY_DISABLED"
+IS_TELEMETRY_ENABLED = os.environ.get(TELEMETRY_DISABLED_ENV_VAR, "false").lower() not in ["true", "1"]
+
+APP_INFO = (
+    {
+        "agent-framework-version": f"python/{version_info}",
+    }
+    if IS_TELEMETRY_ENABLED
+    else None
+)
+USER_AGENT_KEY: Final[str] = "User-Agent"
+HTTP_USER_AGENT: Final[str] = "agent-framework-python"
+AGENT_FRAMEWORK_USER_AGENT = f"{HTTP_USER_AGENT}/{version_info}"
+
+
+def prepend_agent_framework_to_user_agent(headers: dict[str, Any]) -> dict[str, Any]:
+    """Prepend "agent-framework" to the User-Agent in the headers.
+
+    Args:
+        headers: The existing headers dictionary.
+
+    Returns:
+        The modified headers dictionary with "agent-framework-python/{version}" prepended to the User-Agent.
+    """
+    headers[USER_AGENT_KEY] = (
+        f"{AGENT_FRAMEWORK_USER_AGENT} {headers[USER_AGENT_KEY]}"
+        if USER_AGENT_KEY in headers
+        else AGENT_FRAMEWORK_USER_AGENT
+    )
+
+    return headers
+
+
+__all__ = ["AGENT_FRAMEWORK_USER_AGENT", "APP_INFO", "USER_AGENT_KEY", "prepend_agent_framework_to_user_agent"]