refactor: remove integration tests and sim_adapter

[hlin99]

Tests migrated to xPyD-integration. Remove integration/ + stress/ + sim_adapter.py + conftest.py + xpyd-sim dep.

Removed:

• tests/integration/ (~115 tests)
• tests/stress/ (~10 tests)
• sim_adapter.py
• tests/conftest.py (only used by integration tests)
• 2 integration-style tests from test_metrics.py (used client fixture from conftest)
• xpyd-sim dev dependency from pyproject.toml

Remaining: 393 unit tests, all passing.

[hlin99-Review-Bot]

CI is failing because .github/workflows/ci.yml still references the deleted directories:

1. test job: python -m pytest tests/unit/ tests/integration/ -v — tests/integration/ no longer exists.
2. build job: pip install ... xpyd-sim && python -m pytest tests/integration/test_cli_and_discovery.py -v — file no longer exists, and xpyd-sim is no longer a dependency.
3. benchmark job: python -m pytest tests/stress/ -v — tests/stress/ no longer exists.

The PR removes the test files and xpyd-sim dep but does not update the CI workflow. Please update .github/workflows/ci.yml to:

• Remove tests/integration/ from the test command (just run tests/unit/).
• Remove or update the build job that runs test_cli_and_discovery.py.
• Remove or update the benchmark job that runs tests/stress/.

Also: no linked GitHub Issue found in the PR description. If this relates to an issue, please reference it.

[hlin99-Review-BotX]

CI is red — the workflow (.github/workflows/ci.yml) still references the deleted directories and the removed xpyd-sim dependency:

1. test job: runs tests/integration/ which no longer exists.
2. build job: installs xpyd-sim and runs tests/integration/test_cli_and_discovery.py — both removed.
3. benchmark job: runs tests/stress/ which no longer exists.

The CI workflow must be updated to match the removed files. Agree with hlin99-Review-Bot's earlier review — this is still unresolved on the current commit.

Additionally, no linked GitHub Issue in the PR description.

[hlin99]

Fixed in f99078d.

[hlin99-Review-Bot]

The CI workflow updates address the previous review feedback (removed integration/stress/benchmark references), but the build job is now failing with 20 test failures.

Root cause: The build job installs only pytest (pip install pytest) then runs the full unit test suite (python -m pytest tests/unit/ -v). However, several unit tests in test_discovery_models.py and test_pd_metrics.py are async (@pytest.mark.anyio) and require pytest-asyncio (or anyio) to run. Since the build job only installs bare pytest, all async tests fail with async def functions are not natively supported.

Fix options:

1. Change the build job test step to also install pytest-asyncio: pip install pytest pytest-asyncio && python -m pytest tests/unit/ -v --tb=short
2. Or skip the unit test run in the build job entirely (its purpose is to verify the wheel installs and xpyd --help works — the test job already runs the full suite with .[dev]).

Option 2 seems cleaner since the test matrix already covers unit tests thoroughly.

The rest of the PR looks good — file deletions are correct, .isort.cfg updated, pyproject.toml cleaned up, test_metrics.py integration tests properly removed, README updated. No issues with the code changes themselves.

[hlin99-Review-Bot]

This step installs only pytest but runs unit tests that include async tests requiring pytest-asyncio. Either install pytest-asyncio too, or remove this test step from the build job (the test matrix already covers unit tests with full dev deps).

[hlin99-Review-BotX]

Previous CI issues (deleted directories referenced in workflow) are fixed, but the build job is still failing.

Problem: The build job step pip install pytest && python -m pytest tests/unit/ -v --tb=short installs only bare pytest, but several unit tests (test_discovery_models.py, test_pd_metrics.py) use @pytest.mark.anyio and require pytest-asyncio. This causes 20 test failures with async def functions are not natively supported.

Suggested fix: Either:

1. Remove the unit test step from the build job entirely — the test matrix already runs the full suite with .[dev] deps. The build job purpose is to verify the wheel installs and xpyd --help works.
2. Or install pytest-asyncio as well: pip install pytest pytest-asyncio.

Option 1 is cleaner since it avoids duplicating test coverage.

Also: no linked GitHub Issue in the PR description (noted in previous review as well).

[hlin99]

Fixed in 93d1033 — removed the redundant unit test step from the build job as suggested. The test matrix already covers unit tests with full dev deps. Build job now only verifies wheel install + xpyd --help.