Feat/kv + routes

[thomas-mauran]

this pr has been coded by @sea-gull-diana here

What's this PR do ?

This PR takes the kv implementation from @charley04310 's PR and uses it to implement routes workloads and instances
When scheduling an instance in the POST instances route, the program creates a thread where it follows the stream returned by the scheduler and saves updates to a kv::Batch, which is read and saved to the kv store every 5 seconds.

We are also now generating uuids for instances and send them to scheduler on instance creation. These uuids can be sent to scheduler later in order to stop or destroy instances.

Other changes:

• Created a KeyValueBatch struct which has a batch property and implements Defer and DerefMut (hopefully correctly), thus allowing me to clear the batch after every update.
• Return instance id to client on instance creation.
• Add mutex for kv management
• Match status code

[thomas-mauran]

ping @sameo for a review

[sameo]

@charley04310 Any idea why the CI is not triggered with that PR?

[charley04310]

@sameo, I would say that this mainly comes from the fact that the CI is only implemented on push event. Would the workflow need updating like something like this ?

on:
  pull_request:
    paths:
      - "controller/**"

[sameo]

@sameo, I would say that this mainly comes from the fact that the CI is only implemented on push event. Would the workflow need updating like something like this ?

on:
  pull_request:
    paths:
      - "controller/**"

Ah yes, it should. Thanks!

[sameo]

All PRs should trigger the CI.

[sameo]

Please rebase this PR.

[thomas-mauran]

Please rebase this PR.

Should be good now

[thomas-mauran]

ping @sameo for a review