back-end: Measure products

[pylipp]

EPIC: Products with measure (continuous size)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.87%. Comparing base (d9d3644) to head (babe87d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1537 +/- ## ========================================== + Coverage 85.85% 85.87% +0.02% ========================================== Files 229 230 +1 Lines 21709 21740 +31 Branches 1927 1929 +2 ========================================== + Hits 18639 18670 +31 Misses 3034 3034 Partials 36 36 ``` | [Flag](https://app.codecov.io/gh/boxwise/boxtribute/pull/1537/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boxwise) | Coverage Δ | | |---|---|---| | [backend](https://app.codecov.io/gh/boxwise/boxtribute/pull/1537/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boxwise) | `99.07% <ø> (+<0.01%)` | :arrow_up: | | [frontend](https://app.codecov.io/gh/boxwise/boxtribute/pull/1537/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boxwise) | `82.69% <ø> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boxwise#carryforward-flags-in-the-pull-request-comment) to find out more.

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