Document EF Core 11 indexing enhancements

[Copilot]

Adds documentation for EF Core 11 indexing changes from recent EF Core work: complex-property keys/indexes, SQL Server JSON indexes, and expanded Cosmos indexing policy support.

• Complex type keys and indexes

  • Documented keys and indexes over scalar properties nested in complex types.
  • Added guidance for string-based paths and complex collection index paths.

• SQL Server JSON indexes

  • Added provider documentation for JSON indexes over JSON-mapped complex types.
  • Mentioned scaffolding/migrations behavior and array path limitations.

• Cosmos indexing policy

  • Documented HasAutomaticIndexing, indexing exclusions, explicit indexes, and complex collection paths.

• What’s New

  • Added EF Core 11 entries linking to the detailed documentation.

Example:

modelBuilder.Entity<Customer>()
    .HasIndex("Contact.Address.City");

modelBuilder.Entity<Order>()
    .HasIndex(o => o.Items.Select(i => i.Sku));

[Copilot]

Pull request overview

This PR adds EF Core 11 documentation for new indexing-related capabilities across complex types, SQL Server JSON indexes, and expanded Cosmos DB indexing policy support, and surfaces these additions in the EF Core 11 “What’s New” page.

Changes:

• Documented keys and indexes over scalar properties inside complex (non-collection) types, including string-path configuration and complex collection path syntax.
• Added SQL Server provider guidance for creating/scaffolding JSON indexes over JSON-mapped complex types.
• Added Cosmos provider documentation for indexing policy emission/configuration, including automatic indexing control and path exclusions.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
entity-framework/core/what-is-new/ef-core-11.0/whatsnew.md	Adds EF Core 11 release-note entries for complex-type keys/indexes, SQL Server JSON indexes, and Cosmos indexing policy with links to detailed docs.
entity-framework/core/providers/sql-server/index.md	Introduces a new section documenting SQL Server JSON indexes and related configuration examples.
entity-framework/core/providers/cosmos/modeling.md	Adds a new “Indexing policy” section describing Cosmos indexing policy configuration and complex-path indexing.
entity-framework/core/modeling/keys.md	Documents key configuration over scalar properties nested in complex types, including string-based paths and limitations.
entity-framework/core/modeling/indexes.md	Documents indexing over complex type properties (including JSON/collection paths) and complex-type included columns for SQL Server.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

[AndriySvyryd]

@copilot Explain that automatic indexing is disabled automatically in this case

[Copilot]

Updated the sentence to clarify that automatic indexing is disabled automatically as soon as any single-property index is defined, so calling HasAutomaticIndexing(false) explicitly is unnecessary.