Task queue webhook

[irevoire]

Prototype prototype-task-queue-webhook-1

The prototype is available through Docker by using the following command:

docker run -p 7700:7700 -v $(pwd)/meili_data:/meili_data getmeili/meilisearch:prototype-task-queue-webhook-1

Pull Request

Implements the task queue webhook.

Related issue

Fixes #4236

What does this PR do?

• Provide a new cli and env var for the webhook, respectively called --task-webhook-url and MEILI_TASK_WEBHOOK_URL
• Also supports sending the requests with a custom Authorization header by specifying the optional --task-webhook-authorization-header CLI parameter or MEILI_TASK_WEBHOOK_AUTHORIZATION_HEADER env variable.
• Throw an error if the specified URL is invalid
• Every time a batch is processed, send all the finished tasks into the webhook with our public TaskView type as a JSON Line GZIPed body.
• Add one test.

PR checklist

Before becoming ready to review

• Add a test
• Compress the data we send
• Chunk and stream the data we send
• Remove the unwrap in the index-scheduler when sending the data fails
• The analytics are missing

Before merging

• Release a prototype

[dureuill]

bors merge

[meili-bors]

Build succeeded:

• Run Clippy
• Run Rustfmt
• Run tests in debug
• Tests on macos-12
• Tests on ubuntu-18.04
• Tests on windows-2022