Minor refactor to tracing to remove complexity and restructure some spans

[udpatil]

Describe your changes and provide context

This does a minor refactor to tracing utils to simplify them, and manage block spans on the parent function

Testing performed to validate your change

Unit tests

[github-actions]

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Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Oct 30, 2025, 8:17 PM

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.14%. Comparing base (30f5ed6) to head (d446dbe).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
app/abci.go	71.42%	2 Missing ⚠️

❌ Your project status has failed because the head coverage (47.73%) is below the target coverage (50.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2520   +/-   ##
=======================================
  Coverage   43.14%   43.14%           
=======================================
  Files        1583     1583           
  Lines      139151   139129   -22     
=======================================
- Hits        60036    60028    -8     
+ Misses      73671    73657   -14     
  Partials     5444     5444           

Flag	Coverage Δ
sei-chain	31.32% <81.81%> (+0.01%)	⬆️
sei-cosmos	52.37% <100.00%> (-0.04%)	⬇️
sei-db	47.58% <ø> (ø)
sei-tendermint	47.72% <ø> (+<0.01%)	⬆️
sei-wasmd	46.37% <ø> (-0.01%)	⬇️
sei-wasmvm	40.37% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
app/app.go	72.50% <100.00%> (+0.25%)	⬆️
sei-cosmos/utils/tracing/tracer.go	90.24% <100.00%> (-3.51%)	⬇️
app/abci.go	60.00% <71.42%> (-2.80%)	⬇️

... and 16 files with indirect coverage changes

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