### Summary
In some cases, the query parameters for a MongoDB aggregation pipeline were not being initialized.
This led to errors in `GET /api/v1/vaas/{chain}/{emitter}/{seq}`.
Other endpoints could also have been affected.
### Summary
* On all endpoints, fix the behavior of the `page` parameter (which was previously being ignored).
* On `GET /api/v1/vaas`, fix the behavior of the `sortBy` parameter (which wasn't working when `parsedPayload=true`).
* For all endpoints, validate the query parameters `page`, `pageNumber` and `sortOrder`.
* Return descriptive errors when pagination-related parameters happen to be invalid (`page`, `pageSize`, `sortOrder`).
* Validate guardian addresses in query params.
### Testing plan
All parameters involved were manually tested.
* Add use of sequence cache in API
* Add sequence cache in fly
* Deploy for API
* Improve use cache in API
* Remove sequence cache in fly for pythnet
Co-authored-by: Fernando Torres <fert1335@gmail.com>
agodnic
walker-16
gipsh