Data Model for Instances deployment

Relying on management/startinblox-feature-requests#268 (comment 62122)

Covering by: #224 (closed)

changed milestone to %[INV23] SaaS web interface

added specs label

@jbpasquier @balessan I started some specs for this with a data model here: https://git.startinblox.com/plup/notes/blob/master/deployment_platform_specs.md#data-model-for-the-inventory

It's far from complete.

Keep tracks for myself:

• https://snippet.vraiment.top/?fe680454ba789b44#HTziiZNPvTFCMx5XxmYSbae38HmeugA2hMTf5U1GVbG1

@plup your snippet here is dead. So sad.

changed the description

mentioned in issue #225 (closed)