Fix using a schema with a custom migration table name

[eugenetriguba]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 76.19048% with 5 lines in your changes missing coverage. Please review.

Project coverage is 85.91%. Comparing base (a7f3881) to head (960bb84).
Report is 2 commits behind head on main.

Files	Patch %	Lines
internal/storage/mssql.go	54.54%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
- Coverage   86.18%   85.91%   -0.27%     
==========================================
  Files          12       12              
  Lines         760      774      +14     
==========================================
+ Hits          655      665      +10     
- Misses         72       74       +2     
- Partials       33       35       +2     

Flag	Coverage Δ
unittests	85.91% <76.19%> (-0.27%)	⬇️

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