High Precision Aggregations Meta-issue & Discussion

[not-napoleon]

We have several loosely connected issues around increasing aggregation precision. These generally fall into two categories - cases that lose precision in the long to double conversion, and cases for which longs do not offer enough precision either. Links to specific use cases to follow.

[elasticmachine]

Pinging @elastic/es-analytics-geo (:Analytics/Aggregations)

[nik9000]

Another interesting thing: #60050

[not-napoleon]

Supporting nanosecond dates in aggregations has many related concerns with more general high precision support. See #52568

[imotov]

We might also consider adding a better support for SCALED_FLOAT outlined in #84064 as a part of this effort.