[Hubs] Architecture – Add an architecture diagram to docs

[flanakin]

⚠️ Problem

People want to see an architecture diagram of what's included in FinOps hubs.

🛠️ Solution

Add an architecture diagram to the docs and the AQT readme that includes:

1. Cost Management pushes exports to ADLS
2. ADF reads data from and transforms data to parquet in ADLS
3. Power BI reads data from ADLS
4. ADF reads credentials from KeyVault

🙋‍♀️ Ask for the community

We could use your help:

1. Please vote this issue up (👍) to prioritize it.
2. Do you want to see any other resources captured in the diagram?
3. Should this cover the deployment process as well, which includes other resources?
4. Are the current data processing diagrams sufficient or do we need to update those as well? If so, how?
5. Leave comments to help us solidify the vision.

[FallenHoot]

What do we think about this:

PowerPoint Diagrams are easy to use and icons come from - https://github.com/David-Summers/Azure-Design

My suggestion would be to have multiple diagrams depending on how detailed we want to be on each design phase. Azure FinOps Diagrams 11-24.pptx

[AErmie]

I think this is a good start, but it should be updated to reflect the changes in v0.7, which includes a VNet, various Subnets/NSGs, Private Endpoints, DNS Zones, etc.

It would also be great (at a lower-level), to show/list the permissions each Managed Identity has/needs, the storage container structure, etc.