Views under SoC tab are (still) slow

[gctucker]

Some of the views under the SoC tab on the frontend are still slow. While the equivalent views under the Tests tab are working well, there seems to be an issue with either the queries being used for SoC or yet more Mongo DB indexes missing.

Here is the top-level SoC page which loads quickly enough:
https://kernelci.org/soc/

Then when choosing one SoC family, the views are too slow and sometimes hit the 30s timeout in the backend.