[sync] solve error around starting block Number

[stdevMac]

Resolves #361

Description

Solve the problem that exists around the initial block fetched.

Changes:

• Set as default that the minimum block synced and the current block synced, both are the minimum between the block and the state processed.
• Fix Syncing response on Sync

Types of changes

• Bugfix (non-breaking change which fixes an issue)

Testing

Requires testing: No

Did you write tests??: No

[codecov[bot]]

Codecov Report

Merging #362 (12a4303) into main (fcfe1e1) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #362   +/-   ##
=======================================
  Coverage   99.62%   99.62%           
=======================================
  Files          55       55           
  Lines        6464     6467    +3     
=======================================
+ Hits         6440     6443    +3     
  Misses         24       24           

Flag	Coverage Δ
unittests	99.62% <100.00%> (+<0.01%)	:arrow_up:

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

Impacted Files	Coverage Δ
internal/sync/utils.go	100.00% <ø> (ø)
internal/db/sync/manager.go	100.00% <100.00%> (ø)
internal/sync/sync.go	100.00% <100.00%> (ø)
pkg/felt/felt.go	100.00% <0.00%> (ø)
pkg/crypto/weierstrass/weierstrass.go	100.00% <0.00%> (ø)

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