fix: jobsdb schema migration not performed against all datasets

[atzoum]

Description

When a writer jobsdb performed schema migration on its dataset tables, it did it only for the last two.

Notion Ticket

Link

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Base: 46.63% // Head: 46.81% // Increases project coverage by +0.17% 🎉

Coverage data is based on head (b0fd550) compared to base (88f1ec1).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2737      +/-   ##
==========================================
+ Coverage   46.63%   46.81%   +0.17%     
==========================================
  Files         297      297              
  Lines       48696    48697       +1     
==========================================
+ Hits        22711    22796      +85     
+ Misses      24557    24474      -83     
+ Partials     1428     1427       -1     

Impacted Files	Coverage Δ
jobsdb/setup.go	90.69% <100.00%> (+0.22%)	⬆️
jobsdb/jobsdb.go	73.26% <0.00%> (+0.29%)	⬆️
jobsdb/backup.go	76.65% <0.00%> (+0.34%)	⬆️
processor/processor.go	86.40% <0.00%> (+0.41%)	⬆️
warehouse/schema.go	51.42% <0.00%> (+1.14%)	⬆️
config/backend-config/namespace_config.go	70.00% <0.00%> (+3.00%)	⬆️
processor/stash/stash.go	66.66% <0.00%> (+22.09%)	⬆️

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