Support overwriting part of an ephemeris/orientation data

[nyx-space]

Support overwriting part of an ephemeris/orientation data

[pwnorbitals]

Interesting. I definitely see a use-case where we load multiple data sources, make a query at a given timestamp and want to know which data source it comes from. Imo this could be handled by separate multi-context query functions with order-sensitive arguments, ex : anise::multi_query(anise::QueryType::Orientation, timeOfEvent, &[anise_ctx_1, anise_ctx_2, anise_ctx_3]). The result would be from ctx_1 if found there, otherwise from ctx_2 and ctx_3 in order. Also we could have a number of these multi functions with different variants (maybe one to pick the data point with the lowest covariance)... Just throwing ideas :)