[ffe] fix provider initialization for python (#6969)

Author: dd-oleksii

.github/workflows/ci.yml

@@ -78,7 +78,7 @@ jobs:
       library: ${{ matrix.library }}
       scenarios: ${{ needs.compute_libraries_and_scenarios.outputs.scenarios }}
       scenarios_groups: ${{ needs.compute_libraries_and_scenarios.outputs.scenarios_groups }}
-      excluded_scenarios: OTEL_COLLECTOR_E2E${{ matrix.version == 'dev' && matrix.library == 'python' && ',FEATURE_FLAGGING_AND_EXPERIMENTATION' || '' }}  # rely on real backend
+      excluded_scenarios: OTEL_COLLECTOR_E2E  # rely on real backend
       parametric_job_count: ${{ matrix.version == 'dev' && 2 || 1 }}  # test both use cases
       skip_empty_scenarios: true
       display_summary: true

utils/_context/_scenarios/__init__.py

@@ -597,6 +597,15 @@ class _Scenarios:
         rc_api_enabled=True,
         weblog_env={
             "DD_EXPERIMENTAL_FLAGGING_PROVIDER_ENABLED": "true",
+            # set_provider() in Python blocks until we receive RC
+            # configuration for feature flags. But it is only sent
+            # after weblog sucessfully boots and tests start
+            # executing. Unfortunately, Python's OpenFeature SDK does
+            # not have "set provider and don't wait," so we reduce the
+            # timeout here, so that the provider initialization fails
+            # fast, weblog boots, and provider recovers when we set RC
+            # configuration later.
+            "DD_EXPERIMENTAL_FLAGGING_PROVIDER_INITIALIZATION_TIMEOUT_MS": "100",
             "DD_REMOTE_CONFIG_POLL_INTERVAL_SECONDS": "0.2",
             "DD_METRICS_OTEL_ENABLED": "true",
             "OTEL_EXPORTER_OTLP_METRICS_PROTOCOL": "http/protobuf",