Boolean GraphQL types support

[yuskithedeveloper]

Description

Adds first-class support for boolean fields wrapped in Optional, closing a gap in xAPI's partial-update story. The Optional pattern lets mutation inputs distinguish "field not supplied" from "field explicitly set" — previously available for int, decimal, and string, but not bool. Without this, boolean flags in mutation inputs couldn't participate in the same conditional-mapping logic (if (input.Field.IsSpecified) ...) as other scalars.

This PR:

• Adds two scalar graph types — OptionalBooleanGraphType (OptionalBoolean) and OptionalNullableBooleanGraphType (OptionalNullableBoolean) — mirroring the existing int/decimal implementations.
• Registers the type mappings Optional → OptionalBooleanGraphType and Optional<bool?> → OptionalNullableBooleanGraphType in SchemaFactory.
• Registers ValueConverter entries for bool → Optional, bool → Optional<bool?>, and bool? → Optional<bool?>.
  Additionally backfills previously missing converters for the numeric nullable variants: int → Optional<int?>, int? → Optional<int?>, decimal → Optional<decimal?>, and decimal? → Optional<decimal?>.

References

QA-test:

Jira-link:

Artifact URL:

https://vc3prerelease.blob.core.windows.net/packages/VirtoCommerce.Xapi_3.1013.0-pr-74-4c19.zip

[vc-ci]

Review task created: https://virtocommerce.atlassian.net/browse/VCST-5291

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud