refactor: use to/from_json_dict for operation serdes #470

Job	Run time
setup	5s
Wait For Callback Heartbeat Sends	1m 36s
Step with Retry	1m 28s
Hello World	2m 5s
Multiple Wait	1m 31s
Wait State	2m 4s
Callback	1m 51s
Basic Step	1m 23s
Wait For Callback Nested	1m 6s
Wait For Callback Multiple Invocations	1m 31s
Wait For Callback With Child Context	1m 59s
Step with Name	1m 57s
Parallel Operations	2m 1s
Wait for Callback Success	1m 30s
Simple Execution	1m 27s
Block Example	1m 35s
Map Operations	2m 0s
Map with Failure Tolerance	1m 55s
Wait For Callback Mixed Ops	1m 32s
Map with Batch SerDes	1m 55s
Wait For Callback Success Anonymous	1m 22s
Wait For Callback Serdes	1m 55s
Parallel with Custom SerDes	1m 24s
Wait for Condition	1m 51s
Logger Example	1m 28s
Run in Child Context Large Data	1m 59s
Run in Child Context	1m 54s
Map with Max Concurrency	2m 1s
Map with Min Successful	1m 28s
Parallel with Wait	2m 3s
Map with Custom SerDes	1m 28s
Map Completion Config	1m 26s
Wait For Callback Submitter Failure	1m 25s
Map Large Scale	2m 6s
Steps with Retry	2m 3s
Parallel with Max Concurrency	2m 0s
Wait for Callback Failure	1m 33s
Parallel with Failure Tolerance	1m 23s
Handler Error	1m 54s
Wait For Callback Failing Submitter Catchable	1m 26s
Callback Success None	1m 54s
None Results	1m 56s
Create Callback Mixed Operations	1m 30s
Parallel with Batch SerDes	1m 58s
Create Callback Heartbeat	1m 47s
Callback Success	2m 2s
Run In Child Context With Failing Step	1m 29s
Comprehensive Operations	2m 2s
No Replay Execution	1m 25s
Create Callback Custom Serdes	1m 32s
Create Callback Concurrency	3m 3s
	1h 27m 18s

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