UN-2830 [MISC] Suppress OpenTelemetry EventLogger deprecation warning in prompt-service (#1585)

UN-2830 Suppress OpenTelemetry EventLogger LogRecord deprecation warning in prompt-service

Suppressed the LogDeprecatedInitWarning from OpenTelemetry SDK 1.37.0's EventLogger.emit()
method which still uses deprecated trace_id/span_id/trace_flags parameters instead of the
context parameter.

This is a temporary workaround for an upstream bug in OpenTelemetry Python SDK where
EventLogger.emit() was not updated when LogRecord API was changed to accept context parameter.
The warning only appears in prompt-service because llama-index emits OpenTelemetry Events.

See: open-telemetry/opentelemetry-python#4328

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

Author: chandrasekharan-zipstack

prompt-service/src/unstract/prompt_service/config.py

@@ -1,4 +1,5 @@
 import logging
+import warnings
 from os import environ as env
 
 from dotenv import load_dotenv
@@ -22,6 +23,19 @@ def create_app() -> Flask:
     """Creates and configures the Flask application."""
     log_level = env.get("LOG_LEVEL", LogLevel.INFO.value).upper()
     setup_logging(log_level)
+
+    # Suppress OpenTelemetry EventLogger LogRecord deprecation warning
+    # This is a bug in OpenTelemetry SDK 1.37.0 where EventLogger.emit() still uses
+    # deprecated trace_id/span_id/trace_flags parameters instead of context parameter.
+    # See: https://github.com/open-telemetry/opentelemetry-python/issues/4328
+    # TODO: Remove this suppression once OpenTelemetry fixes EventLogger.emit()
+    warnings.filterwarnings(
+        "ignore",
+        message="LogRecord init with.*trace_id.*span_id.*trace_flags.*deprecated",
+        category=DeprecationWarning,
+        module="opentelemetry.sdk._events",
+    )
+
     log_level = getattr(logging, log_level, logging.INFO)
     app = Flask("prompt-service")
     app.logger.setLevel(log_level)