feat: impl custom timer to track latency. add metrics for bundler pro…

[andysim3d]

…poser and builder.

[Closes/Fixes] #

Proposed Changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.13%. Comparing base (008e59d) to head (8a10e58).
Report is 1 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/builder/src/bundle_proposer.rs	91.84% <100.00%> (+0.01%)	⬆️
crates/builder/src/bundle_sender.rs	73.50% <100.00%> (+0.06%)	⬆️
crates/utils/src/guard_timer.rs	100.00% <100.00%> (ø)

Flag	Coverage Δ
unit-tests	59.13% <100.00%> (+0.02%)	⬆️

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

Components	Coverage Δ
rundler binary	0.00% <ø> (ø)
builder	65.06% <100.00%> (+0.03%)	⬆️
dev	∅ <ø> (∅)
pool	66.65% <ø> (ø)
provider	20.84% <ø> (ø)
rpc	25.87% <ø> (ø)
sim	76.76% <ø> (ø)
tasks	∅ <ø> (∅)
types	67.81% <ø> (ø)
utils	31.73% <100.00%> (+2.34%)	⬆️

[0xfourzerofour]

LGTM