Detect and handle node failures

[pbayer]

I separate this now from issue #21 :

Functionality

• [x] introduce RNFD (remote failure detection) actor,
• [x] supervisors can detect node failures,
• [x] restart actors on spare nodes,
• [x] restart or reset the RNFD with :one_for_all and :rest_for_one strategies.

Integration

• [x] tests,
• [x] documentation,
• [x] examples

[pbayer]

See also

• Detect and handle node failures,
• Introduce an actor for node supervision

[pbayer]

As noticed in CI testing this is not yet very stable since repeated node failures in quick order cause the supervisor to fail at shutdown-restart child with "cannot serialize a running task" on the remote worker. Since I need help with that I

1. transfer this to a new issue and
2. release the current state as v0.2.4

[pbayer]

Register Actors v0.2.4

@JuliaRegistrator register

Release notes:

• supervisors can detect and handle node failures,
• checkpointing (first draft),
• enhanced error handling documentation,
• reorganized documentation (diátaxis framework)

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/35572

After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.

This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via:

git tag -a v0.2.4 -m "<description of version>" bbb46a39dd78f6584dfe7808f8006068cbd7abd8
git push origin v0.2.4

[pbayer]

Actors v0.2.4 is available from the Julia registry