Add overall_size_bytes field to job model

[atruskie]

The AnalysisJobs model currently tracks aggregate statistics for the saved search it executes like overall_count and overall_duration_seconds.

Feature: add a new field that aggregates the data_length_bytes field from the saved search.

Name options:

• overall_size_bytes
• overall_data_length_bytes

Related to #191

[cofiem]

Justification? Is this only for displaying stats, or will the information be used for some kind of action?

[atruskie]

Mainly for stats. Realizing this prototype interface: https://gyazo.com/c9784b0aeb7983ee6e64e156ed34ad04

Additionally, we'd like to report count/duration/size analyzed stats at a larger scale. It'd be good to track this information now before the system is used in earnest.

[cofiem]

Sounds good.

Maybe make a separate issue for tracking overall stats? Would this be part of the generic stats table idea?

[atruskie]

Where practical we hope to encode stats in schema explicitly. This minor suggestion is not part of generalized stats idea (for which issue is coming - nailing down a few things offline first).

[atruskie]

👍