Document database trigger model-building APIs

[Copilot]

The HasTrigger API linked to missing guidance and did not clearly explain that migrations do not create triggers.

• Model configuration

  • Document HasTrigger using the existing sample:

    modelBuilder.Entity<BlogWithTrigger>()
        .ToTable(tb => tb.HasTrigger("TRG_InsertUpdateBlog"));

• Migration limitation

  • Clarify that HasTrigger only registers model metadata.
  • Link to migrationBuilder.Sql guidance for creating trigger DDL.

• Fixes Document database triggers model building APIs #4522

[Copilot]

Pull request overview

Updates EF Core modeling documentation to properly document table trigger configuration via HasTrigger, and clarifies the migrations limitation (triggers are not created by EF migrations).

Changes:

• Added a new “Table triggers” section documenting ToTable(tb => tb.HasTrigger(...)) using an existing sample snippet.
• Clarified that HasTrigger only affects EF model metadata and that trigger DDL must be applied via migrationBuilder.Sql, linking to the relevant migrations guidance.
• Refreshed the page ms.date.

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