Replace parent_id string with OpenTelemetry Context for trace propagation

[Copilot]

Scope classes used parent_id: str (W3C traceparent format) for linking spans. This should use OpenTelemetry's native Context object and expose methods for context propagation headers.

Changes

API Changes

• All scope classes now accept parent_context: Context | None instead of parent_id: str | None
• Added inject_trace_context() → returns W3C trace headers for downstream propagation
• Added get_context() → returns scope's Context for passing to child scopes
• Added extract_trace_context(headers) utility using OTel's standard extract()
• InvokeAgentScope now supports parent_context (was previously missing)

Removed

• Custom W3C trace context parsing (parse_parent_id_to_context) — delegated to OTel

Usage

from microsoft_agents_a365.observability.core import (
    InferenceScope, extract_trace_context
)

# Extract context from incoming HTTP headers
parent_context = extract_trace_context({"traceparent": "00-..."})

with InferenceScope.start(details, agent, tenant, parent_context=parent_context) as scope:
    # Get headers for outbound requests
    headers = scope.inject_trace_context()
    requests.post("https://downstream/api", headers=headers)

[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[Copilot]

Pull request overview

This PR updates the observability “scope” APIs to use OpenTelemetry’s native Context for parent/child span relationships (replacing the previous W3C traceparent string), and adds helpers for standard trace header propagation.

Changes:

• Replace parent_id: str | None with parent_context: Context | None across scope classes (including InvokeAgentScope).
• Add W3C propagation helpers: extract_trace_context(headers) and scope methods to inject/forward context (inject_trace_context(), get_context()).
• Update/expand unit tests to validate inject/extract propagation and parent-child span linking.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/observability/hosting/middleware/test_output_logging_middleware.py	Updates middleware test expectations from parent_id to parent_context.
tests/observability/core/test_trace_context_propagation.py	New tests validating inject/extract propagation, span parenting, and InvokeAgentScope support.
tests/observability/core/test_output_scope.py	Updates OutputScope test to build parent_context via extract_trace_context.
tests/observability/core/test_inference_scope.py	Updates InferenceScope test to use parent_context extracted from traceparent.
tests/observability/core/test_execute_tool_scope.py	Updates ExecuteToolScope test to use parent_context extracted from traceparent.
libraries/microsoft-agents-a365-observability-hosting/microsoft_agents_a365/observability/hosting/middleware/output_logging_middleware.py	Extracts parent OTel context from stored traceparent value and passes it into OutputScope.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/utils.py	Removes custom W3C parsing and adds extract_trace_context() backed by OTel propagation.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/spans_scopes/output_scope.py	Updates OutputScope API to accept parent_context and forwards it to the base scope.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/opentelemetry_scope.py	Updates base scope constructor to accept parent_context; adds get_context() and inject_trace_context().
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/invoke_agent_scope.py	Adds parent_context support to InvokeAgentScope.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/inference_scope.py	Updates InferenceScope API to accept and forward parent_context.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/execute_tool_scope.py	Updates ExecuteToolScope API to accept and forward parent_context.
libraries/microsoft-agents-a365-observability-core/microsoft_agents_a365/observability/core/init.py	Exports extract_trace_context from the public core package API.

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