Change trusted_ancestor types from double to unsigned_long

[fearful-symmetry]

Change Summary

CC @pzl

This is a minor update to #720 that changes the metrics types from double to unsigned_long, which is more appropriate.

For mapping changes:

• I ran make after making the schema changes, and committed all changes
• If these field(s) are "exception"-able, I made a companion PR to Kibana adding it (see Readme)
• If this is a metadata change, I also updated both transform destination schemas to match

[pzl]

Looks great, thanks for following up on this!