feature: pass ww PID to the PHP workers

[rustatian]

Reason for This PR

• ref: https://github.com/orgs/roadrunner-server/discussions/2248
• closes: [🐛 BUG]: rr reset not restart main temporal pid #709

Description of Changes

• Pass WW PID to every command via the message field.
• Return PHP WF worker pool restart on reset.

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.

[Copilot]

Pull Request Overview

This PR adds workflow worker PID tracking to prevent sending responses from dead workers, and includes minor comment improvements. The changes help ensure that messages are tagged with the correct worker PID to handle worker lifecycle scenarios more gracefully.

Key Changes

• Added a WorkflowWorkerPID field to the Message structure with JSON serialization support
• Updated PushCommand and AllocateMessage methods to accept and set the workflow worker PID
• Fixed minor grammatical issues in code comments

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
internal/protocol.go	Added WorkflowWorkerPID field to the Message struct for tracking worker identity
queue/queue.go	Updated queue methods to accept and populate the workflow worker PID parameter
queue/queue_test.go	Updated test to pass the new required PID parameter to PushCommand
aggregatedpool/workflow.go	Added logic to retrieve and pass workflow worker PID when pushing commands; fixed comment grammar
aggregatedpool/handler.go	Added workflow worker PID retrieval logic across multiple handler methods
aggregatedpool/workers.go	Fixed extra whitespace in comment
go.work.sum	Updated dependency checksums

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