chore: 0.4.0 release

[isaacvando]

Ticket(s) Closed

Release 0.4.0 including the expanded migration functionality and removal of erroneous validation that prevented a valid query shape.

What

Why

How

Tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.97%. Comparing base (add01b4) to head (36974c5).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #78   +/-   ##
=======================================
  Coverage   89.97%   89.97%           
=======================================
  Files          19       19           
  Lines        2355     2355           
  Branches      698      698           
=======================================
  Hits         2119     2119           
  Misses        236      236           

Flag	Coverage Δ
rails-paradedb	89.97% <100.00%> (ø)
rb3.2	90.26% <100.00%> (ø)
rb3.3	90.26% <100.00%> (ø)
rb3.4	89.97% <100.00%> (ø)
rb4.0	89.97% <100.00%> (ø)
rl7.2	89.97% <100.00%> (ø)
rl8.1	89.97% <100.00%> (ø)

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Files with missing lines	Coverage Δ
lib/parade_db/version.rb	100.00% <100.00%> (ø)

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