fix: retry with search history enabled after some attempts

[kylezs]

Pull Request

Closes: PRO-1762

Checklist

Please conduct a thorough self-review before opening the PR.

• I am confident that the code works.
• I have written sufficient tests.
• I have written and tested required migrations.
• I have updated documentation where appropriate.

Summary

In some cases egress witnessing can fail because the Solana nodes don't keep the transactions in a local cache. This isn't so bad, it just means we might retry a bit more than necessary, and also that we display the status as "pending". This should resolve it though.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 29 lines in your changes missing coverage. Please review.

Project coverage is 71%. Comparing base (eedf6b8) to head (88dff39).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
engine/src/sol/retry_rpc.rs	0%	29 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main   #5370    +/-   ##
======================================
- Coverage     72%     71%    -0%     
======================================
  Files        497     497            
  Lines      86352   86239   -113     
  Branches   86352   86239   -113     
======================================
- Hits       61759   61559   -200     
- Misses     21814   21893    +79     
- Partials    2779    2787     +8     

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