Add Description and suffix to GetTaskIndex

Description

Please delete options that are not relevant.

[ ] “Hotfix” to testnet, everything else to staging
[ ] Linked to Github Issue
[ ] This change depends on code or research by an external entity
- [ ] Acknowledgements were updated to give credit
[ ] Unit tests added
[ ] This change requires new documentation.
- [ ] Documentation has been added/updated.
[ ] This change is an Optimization
- [ ] Benchmarks added/run
[ ] Has a known issue
- [Link to the open issue addressing it]()
[ ] If your PR changes the Operator compatibility (Ex: Upgrade prover versions)
- [ ] This PR adds compatibility for operator for both versions and do not change batcher/docs/examples
- [ ] This PR updates batcher and docs/examples to the newer version. This requires the operator are already updated to be compatible