groupBy fix: when a group's dimension value is NULL, we need to adapt
the raw sql (stage: NULL -> stage IS NULL)
typeMapper fix: a graphql type should be made non-nullable if was
indicated so + does not have a default value. our check on not having a
default value was limited to having a null defaultValue instead of
having a null or undefined defaultValue. This is a breaking change, but
all the queries that were providing a null value for these args were not
functioning anyway, and luckily in the FE we declared all queries adding
a `!` already.
## Introduction
After enabling flag by default got following errors:
```ts
Test Suites: 48 failed, 1 skipped, 97 passed, 145 of 146 total
Tests: 499 failed, 1 skipped, 644 passed, 1144 total
Snapshots: 61 failed, 133 passed, 194 total
Time: 363.226 s
Ran all test suites.
```
## From
<img width="2952" height="1510" alt="image"
src="https://github.com/user-attachments/assets/7e3b20c6-2552-40a7-90bb-2d7b3002c895"
/>
## To
<img width="3134" height="1510" alt="image"
src="https://github.com/user-attachments/assets/4fc9ada4-3c14-4333-a1db-11daf87db8d6"
/>
There's a huge test bundle in the latest shard that we could split up
## Notes
- Set as failing morph relation field rename as for the moment we do not
handle relation field mutation
- fixed the object update and creation validation adding label
identifier field metadata id checks
- and more
Some integrations tests are still on the v1 ( they have before and after
all disabling and re-enabling the flat ) but mainly we now have more
coverage on the v2 than the v1.
Mainly related records, uniqueness have to be migrated the v2 and so
tests too
Marie