feat: propagate context through workflow execution

[timl3136]

What changed?
Context propagation

Why?
Necessary feature

How did you test it?
Unit and integration tests

Potential risks

Release notes

Documentation Changes

[gitar-bot]

CI failed: Type Safety Check failed with 5 mypy errors in test files due to incorrect return types and type annotations introduced in the context propagation feature.

Overview

1 type safety check failure found across 1 log, directly related to the PR changes introducing context propagation.

Failures

Type Safety Check Failure (confidence: high)

• Type: build
• Affected jobs: 90724535767
• Related to change: yes
• Root cause: Mypy reported 5 type errors in test files (tests/integration_tests/workflow/test_context_propagation.py and tests/cadence/test_context.py), including returning Any where HistoryEvent was expected and incorrect generator/context manager return type annotations.
• Suggested fix: Update the return type annotations and ensure proper typing for the context manager and test helpers in tests/integration_tests/workflow/test_context_propagation.py and tests/cadence/test_context.py.

Summary

• Change-related failures: 1 build/type-checking failure (5 mypy errors across 2 files)
• Infrastructure/flaky failures: None
• Recommended action: Fix the mypy type errors in the affected test files by correcting the function return types and generator annotations.

Code Review ✅ Approved

Propagates context through workflow execution to enable proper request tracing and cancellation. No issues found.

Tip

Comment Gitar fix CI or enable auto-apply: gitar auto-apply:on

Options

Auto-apply is off → Gitar will not commit updates to this branch.
Display: compact → Showing less information.

Comment with these commands to change the behavior for this request:

Auto-apply	Compact
gitar auto-apply:on	gitar display:verbose

_{Was this helpful? React with 👍 / 👎 | Gitar}

[codecov]

Codecov Report

❌ Patch coverage is 78.65854% with 35 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cadence/sample/context_propagation_example.py	0.00%	32 Missing ⚠️
cadence/testing/_workflow_environment.py	89.47%	1 Missing and 1 partial ⚠️
cadence/worker/_types.py	66.66%	1 Missing ⚠️

Files with missing lines	Coverage Δ
cadence/__init__.py	100.00% <100.00%> (ø)
cadence/_internal/activity/_activity_executor.py	94.78% <100.00%> (+0.13%)	⬆️
cadence/_internal/activity/_context.py	93.04% <100.00%> (+0.38%)	⬆️
cadence/_internal/context.py	100.00% <100.00%> (ø)
cadence/_internal/workflow/context.py	93.61% <100.00%> (+0.23%)	⬆️
cadence/_internal/workflow/workflow_engine.py	91.21% <100.00%> (+0.37%)	⬆️
cadence/activity.py	83.42% <100.00%> (+0.09%)	⬆️
cadence/client.py	88.00% <100.00%> (+0.61%)	⬆️
cadence/context.py	100.00% <100.00%> (ø)
cadence/worker/_activity.py	100.00% <ø> (ø)
... and 5 more

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.