feat(status-page): updates for a3

[cyberhorsey]

• 8 decimals now, not 18 for tko token. read from contract directly
• fixes bug in calculating proof time in eventindexer
• fixes some issues with block indexing in eventindexer
• add proof time target to status page

stats endpoint returns correct values now:

{
    "id": 1,
    "averageProofTime": 143,
    "averageProofReward": 111418956,
    "numProofs": 741,
    "numVerifiedBlocks": 712
}

keeping in mind we cant index events before today, since the event signature changed.

our current proofTimeTarget is 150, so 143 is on point, and average proof reward for today is a more sensible 1.1 TKO.

[codecov]

Codecov Report

Merging #13821 (4b632a1) into main (fa8f195) will decrease coverage by 0.03%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##             main   #13821      +/-   ##
==========================================
- Coverage   47.41%   47.39%   -0.03%     
==========================================
  Files         133      133              
  Lines        3406     3410       +4     
  Branches      310      310              
==========================================
+ Hits         1615     1616       +1     
- Misses       1682     1685       +3     
  Partials      109      109              

Flag	Coverage Δ		*Carryforward flag
bridge-ui	96.16% <ø> (ø)		Carriedforward from 3f7f390
eventindexer	77.38% <100.00%> (-0.71%)	⬇️
protocol	0.00% <ø> (ø)		Carriedforward from 3f7f390
relayer	60.59% <0.00%> (+0.01%)	⬆️
ui	100.00% <ø> (ø)		Carriedforward from 3f7f390

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
packages/relayer/indexer/subscribe.go	56.98% <0.00%> (-1.90%)	⬇️
packages/eventindexer/repo/stat.go	57.89% <100.00%> (+1.13%)	⬆️

... and 2 files with indirect coverage changes

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