fix: async updates handler

[rustatian]

Reason for This PR

• Not able to use Activities, SideEffects, etc. inside the update handler.

Description of Changes

• Two new responses: UpdateValidated and UpdateCompleted.
• Asynchronous updates handler.
• Tests for the Updates logic.

Tests:

1. Run Update.greet workflow -> empty list on exit.
2. Run Update.greet workflow with addNameWithoutValidation method. Args: John Doe 42 -> should return Hello, John Doe 42!.
3. Run Update.greet workflow with addName method. Args: John Doe -> should return Hello, John Doe!.
4. Run Update.greet workflow with addName method. Args: 123 -> should failure with the message: Name must not contain digits.
5. Run Update.greet workflow with throwException method. Args: John Doe -> should failure with the following message: Test exception with John Doe.
6. Run Update.greet workflow with randomizeName method. Args: 1 (int) -> should execute a SideEffect and return a slice with the random string.
7. The same as 6, but with Args: 3 (int) -> should execute a SideEffect and return 3 random strings in a slice.
8. Run Update.greet workflow with addNameViaActivity method. Args: John Doe -> should execute an Activity and return lowercased name: Hello, john doe!.
9. Run AwaitsUpdate.greet; update awaitWithTimeout with args "key", 1, "fallback" -> the Update should sleep for 1 second and return "fallback"; workflow should return {"key": "fallback"} (associative array -> map[string]any) (send exit signal to complete Workflow)
10. Run AwaitsUpdate.greet; start async update await with arg "key" -> will wait for resolving; query getValue with arg "key" should return null; update resolveValue with args "key", "resolved" -> should resolve await in the previous await update and return "resolved"; query getValue with arg "key" should return "resolved"; workflow should return {"key": "resolved"} (send exit signal to complete Workflow)
11. The same as 10, but with 5 await Updates and then 5 resolve Updates (use unique keys in args) -> should open and complete 5 parallel updates.
12. Run AwaitsUpdate.greet; for $i from 1 to 3, start async update awaitWithTimeout with args "key$i", 5, "fallback$i"; for $i from 1 to 3, start async update resolveValue with args "key$i", "resolved$i" -> awaits will be resolved before timeout; workflow should return {"key1": "fallback1", "key2": "fallback2", "key3": "fallback3",} (send exit signal to complete Workflow)

Note

Tests from 9 should be executed with WaitPolicy=StageAccepted, and Temporal server option frontend.enableUpdateWorkflowExecutionAsyncAccepted=true

Warning

All the tests require Temporal option frontend.enableUpdateWorkflowExecution=true

Warning

Need to discard changes in composer.json before merging into master branch

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.