Properly record all guide star matching and offset parameters

During guiding there are a number of parameters that are used that do not end up getting recorded in the database.  These include the parameter flags that are used on the detected stars (ellipticity, shape, size), the flags used to select the catalog stars, and the parameters used for matching (residual threshold).  

Additionally, the actual observation time that is used to calculate the offsets comes from mlp1 but is not recorded anywhere convenient.

Because none of these parameters are recorded, it is hard to re-create the exact offsets that were used for guiding.  Currently we just assume the defaults on most of the parameters but if they were changed for some reason it would be hard to discover. For the observation time, we can use what is recorded in opdb or the agcc fits files, but they are usually off from the mlp1 time by a couple of seconds, which changes the exact values returned.

In order to properly recreate the exact offsets that were used all of these parameters should be recorded at the same time the agc_match and agc_guide_offset tables are written. Most of the values should probably go into the agc_guide_offset table.