Added overloads for simplified func-based activity and orchestrator registration

[cgillum]

Summary

What changed?

Added new overloads for func-based activity and orchestrator registration.

For example, instead of doing this all the time:

static string SendEmail(TaskActivityContext context, string message)
{
    // ...
}

registry.AddActivityFunc<string, string>(nameof(SendEmail), SendEmail);

I can now do this:

[DurableTask(nameof(SendEmail))] // <-- optional
static string SendEmail(TaskActivityContext context, string message)
{
    // ...
}

registry.AddActivityFunc<string, string>(SendEmail);

Why is this change needed?

The current methods are verbose and require writing repetitive code. I found it quite annoying when creating samples.

Issues / work items

There are no work items associated with this PR

Project checklist

• Release notes are not required for the next release
  • Otherwise: Notes added to release_notes.md
• Backport is not required
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• All required tests have been added/updated (unit tests, E2E tests)
• Breaking change? (no)
  • If yes:
    • Impact:
    • Migration guidance:

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AI-assisted code disclosure (required)

Was an AI tool used? (select one)

• No
• Yes, AI helped write parts of this PR (e.g., GitHub Copilot)
• Yes, an AI agent generated most of this PR

If AI was used:

• Tool(s): GitHub Copilot /w Claude Opus 4.5
• AI-assisted areas/files: I don't know what this means?
• What you changed after AI output: Nothing that I can specifically remember

AI verification (required if AI was used):

• I understand the code and can explain it
• I verified referenced APIs/types exist and are correct
• I reviewed edge cases/failure paths (timeouts, retries, cancellation, exceptions)
• I reviewed concurrency/async behavior
• I checked for unintended breaking or behavior changes

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Testing

Automated tests

• Result: Passed

Manual validation (only if runtime/behavior changed)

N/A

---

Notes for reviewers

• N/A

[Copilot]

Pull request overview

This PR adds simplified overloads for func-based activity and orchestrator registration, allowing developers to omit the explicit name parameter. The name is automatically inferred from either a [DurableTask] attribute on the method or the method name itself, reducing boilerplate when registering tasks.

Key changes:

• Added 8 new overloads each for AddOrchestratorFunc and AddActivityFunc that infer task names from delegates
• Extended DurableTaskAttribute to support method-level application for custom naming
• Comprehensive test coverage for all new overload variations including lambda detection

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Abstractions/DurableTaskRegistry.Orchestrators.cs	Added 8 new AddOrchestratorFunc overloads with name inference and GetTaskNameFromDelegate helper method
src/Abstractions/DurableTaskRegistry.Activities.cs	Added 8 new AddActivityFunc overloads with name inference and GetActivityNameFromDelegate helper method
src/Abstractions/DurableTaskAttribute.cs	Extended AttributeUsage to support methods and updated documentation to reflect method usage
test/Worker/Core.Tests/DurableTaskRegistryTests.Orchestrators.cs	Added 10 new test cases covering all orchestrator overload variations and error conditions
test/Worker/Core.Tests/DurableTaskRegistryTests.Activities.cs	Added 10 new test cases covering all activity overload variations and error conditions
src/Abstractions/Entities/TaskEntity.cs	Added string type validation for entity state (unrelated to PR purpose)
misc/misc.csproj	Added Directory.Packages.* to project includes (unrelated to PR purpose)

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

[halspang]

Mostly nits, but I am concerned about a potential breaking change. If you could assuage my fear there, I think we're basically good to go.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated no new comments.