test(otel): exercise http/protobuf in APM_TRACING_OTLP scenario

[bm1549]

Motivation

APM_TRACING_OTLP exercises the OTLP trace-export path but does not pin a protocol, so the new http/protobuf OTLP encoding in dd-trace-py is not covered. This adds protobuf coverage to Test_Otel_Tracing_OTLP.

Changes

Sets OTEL_EXPORTER_OTLP_TRACES_PROTOCOL=http/protobuf on the APM_TRACING_OTLP scenario weblog env. Test_Otel_Tracing_OTLP already normalizes both JSON and protobuf payloads (the is_json content-type branch + the _trace_id_to_hex helper), so no test-logic change is needed.

Depends on the dd-trace-py OTLP http/protobuf feature (DataDog/dd-trace-py#18609) being present in the tested tracer build.

Workflow

1. ⚠️ Created as draft ⚠️
2. Blocked on the dd-trace-py feature landing/releasing before CI can pass.

Reviewer checklist

• Anything but tests/ or manifests/ is modified ? Yes — utils/_context/_scenarios/__init__.py (scenario env). Will get R&P approval before marking ready.
• A docker base image is modified? No.
• A scenario is added, removed or renamed? No — an existing scenario's env is extended.

[github-actions]

CODEOWNERS have been resolved as:

utils/_context/_scenarios/__init__.py                                   @DataDog/system-tests-core

[datadog-prod-us1-5]

 

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⚠️ Warnings

🚦 85 Pipeline jobs failed

Testing the test | System Tests (golang, dev) / End-to-end #2 / chi 2     

🧪 1 Test failed

tests.ffe.test_flag_eval_metrics.Test_FFE_Eval_Config_Exists_Flag_Missing.test_ffe_eval_config_exists_flag_missing[chi] from system_tests_suite   (Fix with Cursor)

AssertionError: Expected metric for non-existent flag 'non-existent-eval-metric-flag', found none. All: []
assert 0 > 0
 +  where 0 = len([])

self = <tests.ffe.test_flag_eval_metrics.Test_FFE_Eval_Config_Exists_Flag_Missing object at 0x7f863c0a5fd0>

    def test_ffe_eval_config_exists_flag_missing(self):
        """Test that missing flag (with config loaded) produces error.type=flag_not_found."""
        assert self.r.status_code == 200, f"Flag evaluation request failed: {self.r.text}"
    
...

Testing the test | System Tests (java, prod) / End-to-end #2 / akka-http 2     

🧪 1 Test failed

tests.appsec.test_blocking_addresses.Test_Blocking_request_body_filenames.test_blocking[akka-http] from system_tests_suite   (Fix with Cursor)

ValueError: No appsec event validate this condition

self = <tests.appsec.test_blocking_addresses.Test_Blocking_request_body_filenames object at 0x7fc81c3adeb0>

    def test_blocking(self):
        """Can block on server.request.body.filenames"""
>       interfaces.library.assert_waf_attack(self.rbf_req, rule="tst-037-014")

tests/appsec/test_blocking_addresses.py:606: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
...

Testing the test | System Tests (php, dev) / End-to-end #1 / apache-mod-7.0 1     

🧪 1 Test failed

tests.ffe.test_flag_eval_metrics.Test_FFE_Eval_Config_Exists_Flag_Missing.test_ffe_eval_config_exists_flag_missing[apache-mod-7.0] from system_tests_suite   (Fix with Cursor)

AssertionError: Expected metric for non-existent flag 'non-existent-eval-metric-flag', found none. All: []
assert 0 > 0
 +  where 0 = len([])

self = <tests.ffe.test_flag_eval_metrics.Test_FFE_Eval_Config_Exists_Flag_Missing object at 0x7f963100b650>

    def test_ffe_eval_config_exists_flag_missing(self):
        """Test that missing flag (with config loaded) produces error.type=flag_not_found."""
        assert self.r.status_code == 200, f"Flag evaluation request failed: {self.r.text}"
    
...

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