fix: attempt to workaround problems reading actions as empty rather than null

[rtyler]

See #3030

[codecov]

Codecov Report

Attention: Patch coverage is 48.45361% with 50 lines in your changes missing coverage. Please review.

Project coverage is 72.62%. Comparing base (ba671c9) to head (48ba19f).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/kernel/snapshot/parse.rs	43.58%	17 Missing and 5 partials ⚠️
crates/core/src/kernel/snapshot/log_data.rs	9.52%	17 Missing and 2 partials ⚠️
crates/core/src/kernel/snapshot/replay.rs	60.00%	4 Missing and 2 partials ⚠️
crates/core/src/protocol/checkpoints.rs	86.36%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3045      +/-   ##
==========================================
- Coverage   72.68%   72.62%   -0.06%     
==========================================
  Files         129      129              
  Lines       41462    41509      +47     
  Branches    41462    41509      +47     
==========================================
+ Hits        30137    30147      +10     
- Misses       9376     9415      +39     
+ Partials     1949     1947       -2     

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