feat: allow errors in message parsing and support business reject outcomes

[davidsteiner]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 97.15909% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.73%. Comparing base (45422d0) to head (83d2f70).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/hotfix/src/session.rs	88.88%	3 Missing ⚠️
crates/hotfix/src/initiator.rs	85.71%	1 Missing ⚠️
crates/hotfix/src/message/business_reject.rs	99.22%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #304      +/-   ##
==========================================
+ Coverage   90.20%   90.73%   +0.52%     
==========================================
  Files          84       86       +2     
  Lines        8394     8732     +338     
==========================================
+ Hits         7572     7923     +351     
+ Misses        822      809      -13     

Flag	Coverage Δ
core	90.60% <97.15%> (+0.54%)	⬆️

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