Fix ParentRequires(string) dropping requirement on named fields

[michaelstaib]

Fixes #10000

[Copilot]

Pull request overview

This PR fixes a regression where ParentRequires(string) could be effectively ignored for named (non-member/inferred) fields, causing required parent properties (e.g., Name) to be omitted from projections and resulting in null/incorrect resolver behavior (as reported in #10000).

Changes:

• Allow field requirements to be stored even when the entity type is not known at descriptor time (common for .Field("...")).
• Make requirements processing resilient to missing entity type information during schema completion.
• Add regression coverage in both Core descriptor tests and Data projection integration tests (with snapshot).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/HotChocolate/Data/test/Data.Tests/ProjectableDataLoaderTests.cs	Adds an integration test covering ParentRequires(nameof(Brand.Name)) on a named field (computedName).
src/HotChocolate/Data/test/Data.Tests/snapshots/ProjectableDataLoaderTests.Brand_Details_Requires_Brand_Name_With_Named_Field.md	Adds snapshot validating the SQL projection includes Brand.Name and the resolver output is correct.
src/HotChocolate/Core/test/Types.Tests/Types/Descriptors/ObjectFieldDescriptorTests.cs	Adds a unit test ensuring ParentRequires(string) sets requirement flags/features for named fields.
src/HotChocolate/Core/src/Types/Types/Descriptors/FieldRequirementFeature.cs	Enables nullable annotations and allows EntityType to be nullable.
src/HotChocolate/Core/src/Types/Types/Descriptors/Configurations/FieldConfiguration.cs	Stops clearing requirements just because entityType is null; preserves requirement metadata for later use.
src/HotChocolate/Core/src/Types/Execution/Requirements/RequirementsTypeInterceptor.cs	Adds a guard to skip requirement processing when no entity type can be determined.

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[github-actions]

Patch coverage

60.0% of changed lines covered (3/5)

File	Covered	Changed	Patch %
…/Types/Execution/Requirements/RequirementsTypeInterceptor.cs	1	3	33.3% 🔴
…/Types/Types/Descriptors/Configurations/FieldConfiguration.cs	1	1	100.0% 🟢
…/Core/src/Types/Types/Descriptors/FieldRequirementFeature.cs	1	1	100.0% 🟢

Uncovered changed lines (JSON)

{
  "sha": "63df907fd8a971e4f8b41ff795258f49ade056b2",
  "files": [
    { "path": "src/HotChocolate/Core/src/Types/Execution/Requirements/RequirementsTypeInterceptor.cs", "ranges": [[49, 50]] }
  ]
}

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Project coverage: 52.4% (216241/412359 lines)