Add Version property to $Context

[AnatoliB]

Add Version property to the $Context object passed to orchestrator functions, similar to Azure/azure-functions-powershell-worker#1108.

As a result, PowerShell Functions users will be able to specify a version in host.json:

{
  "extensions": {
    "durableTask": {
      "defaultVersion": "2.0"
    }
  }
}

and check the orchestration version in their orchestrator functions in order to keep them backward compatible, for example:

if ($Context.Version -eq '1.0') {
    # Legacy code path
    Invoke-DurableActivity 'A'
} elseif ($Context.Version -eq '2.0') {
    # New code path
    Invoke-DurableActivity 'B'
}

Note: Microsoft.Azure.WebJobs.Extensions.DurableTask 3.1.0+ is required for this to work properly.

Pull request checklist

• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • Otherwise: Backport tracked by issue/PR #issue_or_pr
• I have added all required tests (Unit tests, E2E tests)

[Copilot]

Pull Request Overview

This pull request adds a Version property to the $Context object, enabling orchestration functions to identify the version specified in host.json for backward compatibility. Key changes include updating host.json to include the durableTask defaultVersion, updating csproj files to require newer package versions and target framework versions, and modifying tests and the OrchestrationContext model to access and assert the new Version property.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/E2E/durableApp/host.json	Added the "extensions" section with a defaultVersion property
test/E2E/durableApp/extensions.csproj	Updated TargetFramework and DurableTask package to meet version requirements
test/E2E/durableApp/SimpleOrchestrator/run.ps1	Appended a line to output the Context.Version for verification
test/E2E/durableApp/DurableOrchestratorAccessContextProps/run.ps1	Extended orchestration context properties output with Version
test/E2E/AzureFunctions.PowerShell.Durable.SDK.E2E/OrchestrationTests.cs	Added an assertion to verify the orchestration Version
test/E2E/AzureFunctions.PowerShell.Durable.SDK.E2E/DurableClientTests.cs	Modified expected outputs to include the Version value
src/DurableEngine/Models/OrchestrationContext.cs	Introduced a public Version property that reflects the orchestration instance version
src/DurableEngine/DurableEngine.csproj	Upgraded DurableTask packages to version 1.10.0
release_notes.md	Noted the addition of the Version property to $Context