[consensus] Decouple Propose Durability from Broadcast

[patrick-ogrady]

Related: #3543

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✅ Deployment successful! View logs	commonware-mcp	1cef660	Apr 20 2026, 09:05 AM

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[codecov]

Codecov Report

❌ Patch coverage is 76.64234% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.86%. Comparing base (d2b918e) to head (1cef660).
⚠️ Report is 1 commits behind head on cl/rm-double-certify.

Files with missing lines	Patch %	Lines
consensus/src/marshal/coding/marshaled.rs	0.00%	11 Missing and 1 partial ⚠️
consensus/src/marshal/standard/inline.rs	35.29%	10 Missing and 1 partial ⚠️
consensus/src/marshal/standard/deferred.rs	63.15%	5 Missing and 2 partials ⚠️
consensus/src/marshal/core/actor.rs	66.66%	0 Missing and 1 partial ⚠️
consensus/src/simplex/actors/batcher/mod.rs	83.33%	0 Missing and 1 partial ⚠️

@@                   Coverage Diff                    @@
##           cl/rm-double-certify    #3630      +/-   ##
========================================================
+ Coverage                 95.85%   95.86%   +0.01%     
========================================================
  Files                       440      440              
  Lines                    171667   171029     -638     
  Branches                   3997     3976      -21     
========================================================
- Hits                     164544   163956     -588     
+ Misses                     5850     5807      -43     
+ Partials                   1273     1266       -7     

Files with missing lines	Coverage Δ
consensus/src/lib.rs	0.00% <ø> (ø)
consensus/src/marshal/application/validation.rs	100.00% <ø> (ø)
consensus/src/marshal/coding/mod.rs	98.43% <100.00%> (-0.03%)	⬇️
consensus/src/marshal/coding/variant.rs	92.30% <ø> (-7.70%)	⬇️
consensus/src/marshal/core/mailbox.rs	100.00% <100.00%> (ø)
consensus/src/marshal/mocks/harness.rs	98.63% <100.00%> (ø)
consensus/src/marshal/standard/mod.rs	97.13% <100.00%> (+1.33%)	⬆️
consensus/src/ordered_broadcast/mocks/automaton.rs	94.11% <100.00%> (-0.17%)	⬇️
consensus/src/simplex/actors/batcher/actor.rs	93.58% <100.00%> (-0.26%)	⬇️
consensus/src/simplex/actors/voter/actor.rs	97.19% <100.00%> (+0.01%)	⬆️
... and 8 more

... and 16 files with indirect coverage changes

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