Control flow discovery fix

[david-chapela]

Fixed two bugs related to control-flow discovery:

1. Do not escape paths with double quotes in non-Windows systems to avoid errors.
2. Discovery of final BPS model now uses the correct XES log transformation when SplitMiner1 is the discovery algorithm (previously, it created a XES with both start and end events, and SplitMiner interpreted this as self-loops in all activities).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 95.12195% with 2 lines in your changes missing coverage. Please review.

Project coverage is 87.46%. Comparing base (02afc5f) to head (dc8fc8f).

Files with missing lines	Patch %	Lines
src/simod/control_flow/discovery.py	66.66%	1 Missing ⚠️
src/simod/simod.py	75.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #171      +/-   ##
==========================================
+ Coverage   87.39%   87.46%   +0.06%     
==========================================
  Files          57       57              
  Lines        2793     2831      +38     
==========================================
+ Hits         2441     2476      +35     
- Misses        352      355       +3     

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