fix(7702): add max_fill, random_fill, and use for gas estimation

[andysim3d]

[Closes/Fixes] #979

Proposed Changes

[codecov]

Codecov Report

Attention: Patch coverage is 39.50617% with 98 lines in your changes missing coverage. Please review.

Project coverage is 59.10%. Comparing base (2c64f9f) to head (ffafd19).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/provider/src/alloy/entry_point/mod.rs	0.00%	28 Missing ⚠️
crates/types/src/authorization.rs	27.58%	21 Missing ⚠️
crates/pool/src/server/remote/protos.rs	0.00%	18 Missing ⚠️
crates/types/src/user_operation/v0_7.rs	0.00%	13 Missing ⚠️
crates/types/src/user_operation/v0_6.rs	25.00%	12 Missing ⚠️
crates/provider/src/alloy/entry_point/v0_6.rs	0.00%	2 Missing ⚠️
crates/provider/src/alloy/entry_point/v0_7.rs	0.00%	2 Missing ⚠️
crates/types/src/user_operation/mod.rs	75.00%	2 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/pool/src/mempool/pool.rs	96.98% <100.00%> (+<0.01%)	⬆️
crates/pool/src/mempool/uo_pool.rs	92.28% <100.00%> (+0.15%)	⬆️
crates/utils/src/random.rs	100.00% <100.00%> (ø)
crates/provider/src/alloy/entry_point/v0_6.rs	0.00% <0.00%> (ø)
crates/provider/src/alloy/entry_point/v0_7.rs	0.00% <0.00%> (ø)
crates/types/src/user_operation/mod.rs	70.80% <75.00%> (-0.73%)	⬇️
crates/types/src/user_operation/v0_6.rs	89.30% <25.00%> (-1.82%)	⬇️
crates/types/src/user_operation/v0_7.rs	63.35% <0.00%> (-0.32%)	⬇️
crates/pool/src/server/remote/protos.rs	2.21% <0.00%> (-0.04%)	⬇️
crates/types/src/authorization.rs	44.73% <27.58%> (+44.73%)	⬆️
... and 1 more

Flag	Coverage Δ
unit-tests	59.10% <39.50%> (-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	65.60% <ø> (ø)
dev	∅ <ø> (∅)
pool	67.03% <66.66%> (+0.09%)	⬆️
provider	19.41% <0.00%> (-0.08%)	⬇️
rpc	26.43% <ø> (ø)
sim	77.04% <ø> (ø)
tasks	∅ <ø> (∅)
types	66.52% <27.27%> (-0.76%)	⬇️
utils	32.43% <100.00%> (+2.36%)	⬆️

[dancoombs]

I think you still need to address #979 (comment)