Cache record size metric

[codecov-io]

Codecov Report

Merging #1015 into 5.x will decrease coverage by 0.7%. The diff coverage is 84.9%.

@@           Coverage Diff           @@
##             5.x   #1015     +/-   ##
=======================================
- Coverage   94.7%   94.1%   -0.6%     
=======================================
  Files        296     296             
  Lines      27137   26755    -382     
=======================================
- Hits       25695   25162    -533     
- Misses      1442    1593    +151     

Impacted Files	Coverage Δ
guillotina/contrib/memcached/driver.py	83.4% <0.0%> (-1.3%)	:arrow_down:
guillotina/db/transaction.py	89.8% <87.5%> (-0.5%)	:arrow_down:
guillotina/contrib/cache/strategy.py	94.6% <100.0%> (-0.2%)	:arrow_down:
guillotina/tests/test_metrics.py	100.0% <100.0%> (ø)
guillotina/tests/test_cockroach.py	17.7% <0.0%> (-77.9%)	:arrow_down:
guillotina/db/storages/cockroach.py	27.9% <0.0%> (-48.1%)	:arrow_down:
guillotina/db/strategies/dbresolve.py	68.5% <0.0%> (-31.5%)	:arrow_down:
guillotina/db/factory.py	85.3% <0.0%> (-7.7%)	:arrow_down:
guillotina/contrib/cache/api.py	54.6% <0.0%> (-6.9%)	:arrow_down:
guillotina/json/serialize_value.py	82.2% <0.0%> (-3.5%)	:arrow_down:
... and 95 more