feat: metric of reorg depth of blockchain tree

[int88]

fixes part of #3817

[int88]

test result:

root@test:~# curl http://127.0.0.1:9001 | grep latest_reorg
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 27701  100 27701    0     0  13.2M      0 --:--:-- --:--:-- --:--:-- 13.2M
# HELP reth_blockchain_tree_latest_reorg_depth The latest reorg depth
# TYPE reth_blockchain_tree_latest_reorg_depth gauge
reth_blockchain_tree_latest_reorg_depth 0

@Rjected PTAL

[onbjerg]

cc @rkrasiuk / @Rjected / @rakita PTAL

[rkrasiuk]

hmm, i'd rather use a Histogram and plot it as a histogram over time on the dashboard. curious to hear your thoughts @onbjerg

[onbjerg]

hmm, i'd rather use a Histogram and plot it as a histogram over time on the dashboard. curious to hear your thoughts @onbjerg

Not sure wym here, histogram support in the metrics crate we use is kind of not the best, I don't remember the exact issue, but the buckets are not configurable, so might not be worth? Up to you

[Rjected]

It would be good to know the specific deficiencies with Histogram since it's also relevant to this PR: #3865

[Rjected]

nit: could we add a method on the tree for updating both reorg metrics? It could have depth as a parameter

[codecov]

Codecov Report

Merging #3860 (3016091) into main (736de20) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

Files Changed	Coverage Δ
crates/blockchain-tree/src/metrics.rs	100.00% <ø> (ø)
crates/blockchain-tree/src/blockchain_tree.rs	83.37% <100.00%> (+0.08%)	⬆️
crates/storage/provider/src/chain.rs	74.41% <100.00%> (+0.30%)	⬆️

... and 9 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	15.48% <0.00%> (-0.01%)	⬇️
unit-tests	64.50% <100.00%> (-0.01%)	⬇️

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

Components	Coverage Δ
reth binary	27.24% <ø> (ø)
blockchain tree	83.04% <100.00%> (+0.03%)	⬆️
pipeline	89.68% <ø> (ø)
storage (db)	74.20% <100.00%> (+<0.01%)	⬆️
trie	94.70% <ø> (ø)
txpool	46.00% <ø> (ø)
networking	77.63% <ø> (-0.07%)	⬇️
rpc	58.38% <ø> (ø)
consensus	64.46% <ø> (ø)
revm	33.68% <ø> (ø)
payload builder	6.61% <ø> (ø)
primitives	88.04% <ø> (-0.02%)	⬇️

[int88]

nit: could we add a method on the tree for updating both reorg metrics? It could have depth as a parameter

@Rjected updated!

[onbjerg]

lgtm, @Rjected ?

[Rjected]

nice! lgtm