Handle bad OCR cases when parsing documents

[VMelnalksnis]

No description provided.

[codecov]

Codecov Report

Merging #683 (d162d3b) into master (0a5b87a) will increase coverage by 0.06%.
The diff coverage is 93.33%.

@@            Coverage Diff             @@
##           master     #683      +/-   ##
==========================================
+ Coverage   69.12%   69.19%   +0.06%     
==========================================
  Files         303      304       +1     
  Lines        9205     9216      +11     
  Branches      683      683              
==========================================
+ Hits         6363     6377      +14     
+ Misses       2585     2584       -1     
+ Partials      257      255       -2     

Impacted Files	Coverage Δ
.../Importing/ImportingServiceCollectionExtensions.cs	100.00% <ø> (ø)
...ebApi/V1/Importing/Paperless/IdentifiedPurchase.cs	100.00% <ø> (ø)
....WebApi/V1/Importing/Paperless/PaperlessService.cs	0.00% <ø> (ø)
...i/V1/Importing/Paperless/Rimi/RimiReceiptParser.cs	92.15% <85.71%> (ø)
...Importing/Paperless/Rimi/RimiPurchaseIdentifier.cs	91.37% <94.11%> (ø)
...de.WebApi/V1/Importing/Paperless/Rimi/Constants.cs	100.00% <100.00%> (ø)

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