fix: AOT compatibility gaps in PropertyInjector and JsonExtensions

[thomhurst]

Description

Several reflection calls lack proper [DynamicallyAccessedMembers] annotations, which can cause runtime failures under AOT trimming.

PropertyInjector.cs (Lines 244, 387, 393, 409)

Direct calls to metadata.ContainingType.GetProperty() without [DynamicallyAccessedMembers] annotations in InjectSourceGeneratedPropertyAsync and RecurseIntoNestedPropertiesCoreAsync. While methods have [UnconditionalSuppressMessage] for source-gen, the actual calls lack proper safeguards.

JsonExtensions.cs (Lines 68, 80)

classParameterTypes[i].FullName ?? "Unknown"

Accesses FullName without checking for null Types. Generic type parameters or constructed types might return null FullName. No DynamicallyAccessedMembers annotation on input types.

Suggested Fix

• Annotate metadata.ContainingType with [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicProperties)]
• Add null coalescing: classParameterTypes[i]?.FullName ?? classParameterTypes[i]?.Name ?? "Unknown"