ANISE + embed_eph documentation issue

[gwbres]

Bug report

Hello, still in 0.5.3 the library fails to build inside "docrs" : https://docs.rs/crate/gnss-rtk/0.7.6/builds/1768202

which causes the documentation of any dependent library to fail

[gwbres]

For example, this impacts

• the PVT solver
• the Quality Control library

If I remember correctly, the embed_ephem feature reduces the internet connection requirement to once in a lifetime, at build time (which is also important). As opposed to first deployment AND assuming correct local storage management in future deployments