:bug: Fix race condition in Container API

[linkdd]

Decision Record

When creating or updating a container via the API, here's what happens:

sequenceDiagram
    actor Client
    participant PluginAPI
    participant Netbox
    participant Agent

    Client ->>PluginAPI: PATCH with operation=recreate, binds=[...]
    PluginAPI->>Netbox: update Container
    Netbox->>Agent: Webhook Call
    PluginAPI->>Netbox: update binds, ...
    Agent->>Netbox: write back binds=[]

Because the creation/update is not in an atomic transaction, the Agent writes back to Netbox potentially invalid data.

To alleviate this, the Client needs to first PATCH with the data for Netbox, then PATCH operation=recreate (just as you would do in the Netbox UI).

We can skip that part if we use Django transactions.

Changes

• [x] :bug: Use transaction.atomic() for container creation/update in API
• [ ] :white_check_mark: Add test suite

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
2177	2143	98%	90%	✅

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updated for commit: c34d54d by action🐍