fix: propagate shutdown response from schedule calculations

[davidsteiner]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 82.45614% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.41%. Comparing base (9d4735d) to head (7129b2f).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/hotfix/src/initiator.rs	33.33%	4 Missing ⚠️
crates/hotfix/src/session/test_utils.rs	78.94%	4 Missing ⚠️
crates/hotfix/src/session/session_ref.rs	93.75%	2 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## main #346 +/- ##
==========================================
+ Coverage 91.39% 91.41% +0.01% 
==========================================
Files 94 94 Lines 9554 9584 +30 ==========================================
+ Hits 8732 8761 +29 - Misses 822 823 +1 

Flag	Coverage Δ
core	91.30% <82.45%> (+0.01%)	⬆️

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