fix: release concurrency token exhaustion no longer happens on batchTriggerAndWait

[ericallam]

Summary by CodeRabbit

• New Features
  • Introduced a new batch-triggering task that starts and waits for multiple short-duration child tasks.
• Bug Fixes
  • Improved the timing and reliability of concurrency release when runs are suspended and resumed.

[coderabbitai]

Walkthrough

The changes update the concurrency release logic in the WaitpointSystem by moving the release action to occur immediately after a run is suspended by a waitpoint, rather than conditionally later. Additionally, a new batch-triggering mechanism is introduced in the trigger module, adding two tasks: one that triggers and waits for a batch of child tasks, and a child task that simply waits for a specified duration. No changes are made to exported method signatures in the system logic.

Changes

File(s)	Change Summary
internal-packages/run-engine/src/engine/systems/waitpointSystem.ts	Refactored concurrency release logic to occur immediately after suspending a run due to waitpoints.
references/hello-world/src/trigger/release-concurrency.ts	Added batchTriggerAndWaitReleaseConcurrency task and supporting child task for batch-triggering with waits.

Sequence Diagram(s)

sequenceDiagram
    participant ParentTask as batchTriggerAndWaitReleaseConcurrency
    participant ChildTask as batchTriggerAndWaitChildTask
    loop 3 times
        ParentTask->>ChildTask: Trigger with waitSeconds=1
        ChildTask-->>ParentTask: Complete after 1s
    end
    ParentTask-->>ParentTask: Finish after all children complete

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Possibly related PRs

• Remove batch ID carryover for non-batch waits #1930: Modifies batch ID assignment in blockRunWithWaitpoint, related to concurrency handling but addresses different concerns.

Poem

In the warren where tasks hop and run,
Concurrency released, the waitpoint's done.
New batchy bunnies, three in a row,
Wait for a second, then off they go!
With logic refined and triggers anew,
The code leaps forward—hippity-hoo!
🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between e9aaec9 and ef902bd.

📒 Files selected for processing (2)

• internal-packages/run-engine/src/engine/systems/waitpointSystem.ts (2 hunks)
• references/hello-world/src/trigger/release-concurrency.ts (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (2)

• internal-packages/run-engine/src/engine/systems/waitpointSystem.ts
• references/hello-world/src/trigger/release-concurrency.ts

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• GitHub Check: e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)
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Latest commit: ef902bd

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