OPS-157454: Upload test coverage to Codacy from CI

[davidnmbond]

What

Adds a coverage job to ci.yml that runs the tests with code coverage and uploads the Cobertura report to Codacy. It runs on pdl-public because the repository is public.

• Runs the xunit v3 Microsoft.Testing.Platform test executable with --coverage (Microsoft.Testing.Extensions.CodeCoverage), using a coverage.config modelled on PanoramicData.NugetManagement.
• Uploads with codacy/codacy-coverage-reporter-action@v1 using the CODACY_PROJECT_TOKEN secret. The upload has continue-on-error: true, and the report is also kept as a 7-day artifact.

The test project gains UseMicrosoftTestingPlatformRunner so the test executable accepts --coverage; it already referenced Microsoft.Testing.Extensions.CodeCoverage. The build job's dotnet test step was re-checked locally and still passes.

Excluded tests

Tests tagged [Trait("Category", "Integration")] (the ServiceNowTest base class), which call a real ServiceNow instance with credentials from user secrets. The filter Category!=Integration matches the one the build job already uses. 23 offline tests run.

Coverage

Local line coverage in a clean Linux container (mcr.microsoft.com/dotnet/sdk:10.0.401, no user secrets) is 40.0%.

Jira: https://jira.panoramicdata.com/browse/OPS-157454

🤖 Generated with Claude Code

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Coverage ∅ diff coverage

Metric	Results
Coverage variation	Report missing for 43389031
Diff coverage	✅ ∅ diff coverage

View coverage diff in Codacy

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (4338903)	Report Missing	Report Missing	Report Missing
Head commit (002c245)	169	68	40.24%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#91)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

¹ Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct.

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_{TIP This summary will be updated as you push new changes.}