Use `octue` version with question chaining

Contents (#21)

IMPORTANT: There are 2 breaking changes.

Enhancements

• Specify event store table ID in service configuration

Dependencies

• 💥 BREAKING CHANGE: Use octue branch with question chaining

Refactoring

• 💥 BREAKING CHANGE: Rename service to example-service

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Upgrade instructions

💥 Use `octue` branch with question chaining

Send questions from octue>=0.56.0.

💥 Rename service to `example-service`

The service is now reached at octue/example-service