ResourceBasedSlotSupplier.ReleaseSlot not implemented

[captchanjack-anzx]

Expected Behavior

Activity SlotSupplier created with resourcetuner.NewResourceBasedSlotSupplier should release activity slots when they are completed.

Actual Behavior

Activity slots are not released after task is completed. This causes scheduled activities to forever hand in PENDING_ACTIVITY_STATE_SCHEDULED state.

I suspect because the SlotSupplier interface method ReleaseSlot is not implemented:

https://github.com/temporalio/sdk-go/blob/master/contrib/resourcetuner/resourcetuner.go#L204

Steps to Reproduce the Problem

1. Create a tuner with worker.NewCompositeTuner and resourcetuner.NewResourceBasedSlotSupplier as suggested in go-sdk docs
2. Set activity ResourceBasedSlotSupplierOptions.MaxSlots to something small like 4.
3. Start a worker with tuner set in worker.Options
4. Execute a workflow that starts a large amount of activities - few activities should be scheduled, and others should be schedule/stuck in pending state.

Specifications

• Version:

      go.temporal.io/api v1.44.1
  go.temporal.io/sdk v1.33.0
  go.temporal.io/sdk/contrib/resourcetuner v0.0.0-20250227195219-884681f7392e

• Platform: GCP Cloud Run, 8 cores 8GiB per instance, unsure chip used (i think amd based)