refactor(finance)!: simplify account implementation

[ST-DDT]

We have an explicit method for generating a numbers with a given length, so lets use that instead.

This PR is a precondition to deprecating helpers.replaceSymbolWithNumber.

• Deprecate helpers.replaceSymbolWithNumber #1994

[codecov]

Codecov Report

Merging #1992 (b39747a) into next (34b743a) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head b39747a differs from pull request most recent head 3d7f92f. Consider uploading reports for the commit 3d7f92f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #1992      +/-   ##
==========================================
+ Coverage   99.61%   99.62%   +0.01%     
==========================================
  Files        2561     2561              
  Lines      243239   243229      -10     
  Branches     1274     1277       +3     
==========================================
+ Hits       242301   242319      +18     
+ Misses        913      885      -28     
  Partials       25       25              

Impacted Files	Coverage Δ
src/modules/finance/index.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

[ST-DDT]

Team Decision

We will remove the 0 -> 8 mapping.

[Shinigami92]

What a weird code ...
I'm glad we refactored it