chore: shed: storage stats 2.0

[ribasushi]

Checklist

Before you mark the PR ready for review, please make sure that:

• All commits have a clear commit message.
• The PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, INTERFACE BREAKING CHANGE, CONSENSUS BREAKING, build, chore, ci, docs, misc,perf, refactor, revert, style, test
  • area: api, chain, state, vm, data transfer, market, mempool, message, block production, multisig, networking, paychan, proving, sealing, wallet
• This PR has tests for new functionality or change in behaviour
• If new user-facing features are introduced, clear usage guidelines and / or documentation updates should be included in https://lotus.filecoin.io or Discussion Tutorials.
• CI is green

[codecov]

Codecov Report

Merging #7941 (e3c250f) into master (60fae3a) will increase coverage by 4.98%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #7941      +/-   ##
==========================================
+ Coverage   34.32%   39.30%   +4.98%     
==========================================
  Files         652      658       +6     
  Lines       70842    71158     +316     
==========================================
+ Hits        24317    27972    +3655     
+ Misses      42039    38362    -3677     
- Partials     4486     4824     +338     

Impacted Files	Coverage Δ
cmd/lotus-shed/storage-stats.go	0.00% <0.00%> (ø)
chain/events/message_cache.go	87.50% <0.00%> (-12.50%)	⬇️
markets/loggers/loggers.go	89.28% <0.00%> (-10.72%)	⬇️
storage/wdpost_sched.go	77.45% <0.00%> (-3.93%)	⬇️
miner/miner.go	57.37% <0.00%> (-1.64%)	⬇️
node/impl/storminer.go	22.47% <0.00%> (-0.34%)	⬇️
extern/sector-storage/stores/local.go	59.16% <0.00%> (ø)
journal/mockjournal/journal.go	71.42% <0.00%> (ø)
chain/types/mock/chain.go	86.66% <0.00%> (ø)
chain/vectors/gen/main.go	2.36% <0.00%> (ø)
... and 139 more

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