test(integration): add live GitLab generic install smoke

[abhinavgautam01]

Description

Adds an opt-in live smoke test for apm install gitlab.com/<group>/<repo> so the generic git backend is covered end-to-end against GitLab. The test validates package materialization under apm_modules/ and confirms apm.lock.yaml records host: gitlab.com plus a full resolved commit SHA.

The smoke is gated behind APM_LIVE_GENERIC_PACKAGE because the fixture suggested in the issue is not currently public. Scheduled/manual CI wiring is included so maintainers can enable it by setting that repository variable to a stable public APM-shaped GitLab repo.

Fixes #1229

Type of change

• Bug fix
• New feature
• Documentation
• Maintenance / refactor

Testing

• Tested locally
• All existing tests pass
• Added tests for new functionality (if applicable)

Validation run:

uv run --python 3.12 ruff check pyproject.toml tests/integration/test_live_generic_gitlab_install.py
uv run --python 3.12 pytest tests/integration/test_live_generic_gitlab_install.py -m live_generic -o addopts= -v --tb=short
git diff --check

Focused pytest collected the live smoke and skipped locally because APM_LIVE_GENERIC_PACKAGE is not set, since the GitLab repo suggested one from the issue is not available publicly:

gitlab.com/microsoft-apm-fixtures/smoke-pkg -> GitLab API returns 404 Project Not Found

Spec conformance (OpenAPM v0.1)

If this PR changes behaviour that an OpenAPM v0.1 req-XXX covers, confirm the three-step ritual (see CONTRIBUTING.md "Adding or changing a normative requirement"):

• Spec edit: docs/src/content/docs/specs/openapm-v0.1.md updated
  (new/changed anchor + prose + Appendix C
  row).

• Manifest edit: docs/src/content/docs/specs/manifests/openapm-v0.1.requirements.yml
  updated.

• Test edit: a @pytest.mark.req("req-XXX") test under
  tests/spec_conformance/ added or extended.

• CONFORMANCE.{md,json} regenerated via
  uv run --extra dev python -m tests.spec_conformance.gen_statement
  and committed.

• N/A -- this PR does not change OpenAPM-observable behaviour.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds a scheduled/manual live smoke test to validate that apm install can clone and lock a real GitLab-hosted package via the generic git backend.

Changes:

• Introduces a new live integration test that installs a configured GitLab repo and asserts lockfile stamping with a full commit SHA.
• Registers a new live_generic pytest marker.
• Extends the release workflow to run this smoke test on schedule / workflow_dispatch.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
tests/integration/test_live_generic_gitlab_install.py	New live smoke test exercising the generic git clone path against GitLab and validating lockfile fields.
pyproject.toml	Adds live_generic marker so pytest recognizes the new selection.
.github/workflows/build-release.yml	Runs the new smoke test in scheduled/manual workflow runs using repo variable configuration.