branch crawler does not paginate

When looking for a branch with a given name, we might fail to find it if the branch is not on the first page. The default page size seems to be 100, so if there is more than 100 branches, it becomes more an more likely that we don't find the branch we are looking for.

https://github.com/DLR-FT/sysml-v2-sql/blob/c33aa3817a8a63e27411dc3f8980100e6d5c582a/src/fetch.rs#L166-L190