fix: Performance problems

[antoinegelloz]

• fixed a bug where a new logger was created at each request, replacing the previous one with wrapped version, creating a exponential performance problem.
• fine tuned the Numscript cache system; The cost of each Numscript stored in cache is now calculated in bytes; The config can be modified with new flags.
• improved TxsToScriptData method predictability; Postings now always generate the same Numscript (variables declarations list was not always sorted)
• telemetry improvements

[codecov]

Codecov Report

Merging #419 (f1ba45d) into main (cdd925b) will increase coverage by 0.25%.
The diff coverage is 83.73%.

@@            Coverage Diff             @@
##             main     #419      +/-   ##
==========================================
+ Coverage   68.72%   68.98%   +0.25%     
==========================================
  Files          94       95       +1     
  Lines        6511     6522      +11     
==========================================
+ Hits         4475     4499      +24     
+ Misses       1651     1638      -13     
  Partials      385      385              

Impacted Files	Coverage Δ
cmd/server_start.go	73.68% <ø> (+7.64%)	⬆️
pkg/ledger/ledger.go	70.43% <ø> (-0.26%)	⬇️
pkg/storage/sqlstorage/logs.go	75.15% <ø> (-0.15%)	⬇️
pkg/storage/sqlstorage/transactions.go	81.36% <ø> (-0.09%)	⬇️
cmd/container.go	50.00% <55.55%> (-0.91%)	⬇️
pkg/api/middlewares/transaction.go	77.77% <72.72%> (+2.26%)	⬆️
pkg/ledger/cache.go	80.00% <80.00%> (ø)
pkg/ledger/executor.go	68.52% <80.64%> (+0.48%)	⬆️
pkg/storage/sqlstorage/driver.go	67.48% <82.60%> (-0.59%)	⬇️
pkg/api/middlewares/ledger_middleware.go	68.00% <83.33%> (-13.58%)	⬇️
... and 12 more

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