Move mysql attributes to separate table

[cschleiden]

Closes: #39

[cschleiden]

!bench !large

[cschleiden]

!bench !verylarge

[github-actions]

Default run

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
mysql-main	624.1 ± 154.0	500.6	999.0	1.00
mysql-pr	731.6 ± 96.0	568.7	870.7	1.17 ± 0.33

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
sqlite-main	754.3 ± 111.1	600.5	897.0	1.06 ± 0.25
sqlite-pr	712.6 ± 134.1	516.2	901.3	1.00

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redis-main	196.2 ± 8.9	182.7	211.4	1.05 ± 0.11
redis-pr	186.1 ± 16.9	140.1	204.6	1.00

Large payload run (1MB)

Command	Mean [s]	Min [s]	Max [s]	Relative
mysql-main	47.101 ± 3.163	41.326	51.325	1.06 ± 0.08
mysql-pr	44.554 ± 1.495	42.588	47.031	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
sqlite-main	38.030 ± 2.423	33.940	41.359	1.00
sqlite-pr	39.278 ± 1.476	37.707	42.264	1.03 ± 0.08

Command	Mean [s]	Min [s]	Max [s]	Relative
redis-main	39.345 ± 7.120	31.223	49.043	1.08 ± 0.28
redis-pr	36.298 ± 6.645	30.149	50.236	1.00