feat(tracing): enhance OCI Generative AI tracing notebook and integration

- Updated the `oci_genai_tracing.ipynb` notebook to include new prerequisites for Openlayer setup, emphasizing the need for an Openlayer account and API key.
- Improved the configuration section with detailed instructions for setting up Openlayer environment variables.
- Refined the tracing logic in the `oci_tracer.py` module to handle streaming and non-streaming chat completions more effectively, including enhanced error handling and metadata extraction.
- Added comprehensive logging for better observability of token usage and response metadata.
- Ensured all changes adhere to coding standards with thorough type annotations and Google-style docstrings for maintainability.

Author: viniciusdsmello

examples/tracing/oci/oci_genai_tracing.ipynb

@@ -165,7 +165,7 @@
         "\n",
         "print(\"🚀 Making non-streaming chat completion request...\")\n",
         "\n",
-        "# Make the request with custom inference ID for tracking\n",
+        "# Make the request - the tracer will automatically capture with custom inference ID\n",
         "response = traced_client.chat(\n",
         "    chat_details,\n",
         "    inference_id=\"oci-example-1-non-streaming\"\n",
@@ -223,7 +223,7 @@
         "print(\"📡 Streaming response:\")\n",
         "print(\"-\" * 50)\n",
         "\n",
-        "# Make the streaming request\n",
+        "# Make the streaming request with custom inference ID for tracking\n",
         "streaming_response = traced_client.chat(\n",
         "    streaming_chat_details,\n",
         "    inference_id=\"oci-example-2-streaming\"\n",