fix(controller): populate warehouse field in new freight

[krancour]

Follow up to #1984.

Freight have always been indexed by the Warehouse that created them. This is important in determining a piece of Freight's eligibility for promotion to an Stage that's subscribed directly to a Warehouse wherein all Freight from that Warehouse are implicitly qualified.

#1984 mistakenly did not set the Warehouse field on new Freight, which broke that index and, by extension, has made new Freight unavailable for promotion to "zero Stages."

[netlify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.81%. Comparing base (94f8d43) to head (422022c).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2026   +/-   ##
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  Coverage   45.80%   45.81%           
=======================================
  Files         235      235           
  Lines       16191    16192    +1     
=======================================
+ Hits         7417     7418    +1     
  Misses       8413     8413           
  Partials      361      361           

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