feat(libraries): add MigrationMetadata::AppliedStereotype

[devin-ai-integration]

Summary

Adds one metadata definition to MigrationMetadata and lists it in the engine contract. Semver: minor (new definition, no existing entry changed).

metadata def AppliedStereotype {
    attribute stereotype : ScalarValues::String;
    attribute profile : ScalarValues::String[0..1];
    attribute tags : ScalarValues::String[0..*];
}

The OpenSysML SysML v1 migrator stops writing stereotype kinds as package-level comments (dependency A to B; /* «Trace» */), which CATIA Magic / Cameo renders as a Note on every diagram. The v2 element carries the kind in its name (dependency 'A traces B' from A to B) and, in non-strict output, annotates itself with @MigrationMetadata::AppliedStereotype { stereotype = "Trace"; } so tooling can still query the source stereotype. profile is set when the stereotype comes from a profile the migration did not write; tags keeps, as tag = value, the tag values no v2 feature holds.

engine-contract.json gains the MigrationMetadata::AppliedStereotype entry (metadata, attributes stereotype/profile/tags, migratorEmitted, consumers internal/translate/migrate/migrate.go and internal/semantic/semantics/synthesized_name.go); contract stays at 1 since nothing existing changes. Open-MBEE/OpenSysML#1043 re-pins to this commit.

./scripts/validate-libraries.sh: 0 errors, 0 warnings; ./scripts/check-engine-contract.sh and ./scripts/check-readme-table.sh pass (the README row for MigrationMetadata is unchanged).

Link to Devin session: https://nasa-jpl-demo.devinenterprise.com/sessions/e836601d10af4cfcbdf98bc3321f53cd
Open in Devin Desktop: https://nasa-jpl-demo.devinenterprise.com/desktop/session/e836601d10af4cfcbdf98bc3321f53cd?variant=devin
Requested by: @HuiJun

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[devin-ai-integration]

The advisory job (OpenSysML against these libraries, continue-on-error) is red for two reasons, neither in this PR's control:

1. TestEngineContractCoversEveryBoundName: the contract now lists MigrationMetadata::AppliedStereotype, but OpenSysML develop does not derive it yet — fix(migrate): carry stereotype kinds in names and metadata, not comments OpenSysML#1043 adds the binding and re-pins to this change. A new migrator-emitted binding is red here until that PR lands, then red there until this one does; the required Validate the extension libraries check is green.
2. TestKerMLFeatureMetaclassClassification on develop reads examples/pilot-corpora/kerml-examples/Vehicle Example/VehicleUsages.kerml and fails rather than skips when the pilot corpora are absent; this workflow does not run scripts/download-pilot-corpora.sh. Unrelated to this change.

[devin-ai-integration]

Superseded by #5, which landed the same MigrationMetadata::AppliedStereotype definition and engine-contract.json entry on main (a74e6d6); Open-MBEE/OpenSysML#1043 pins 73bed35. Closing.