feat(testing-sdk): execution state pagination and token validation #384

Job	Run time
setup	5s
Hello World	1m 14s
Step with Retry	1m 10s
Basic Step	1m 0s
Wait for Callback Success	1m 9s
Parallel Operations	1m 1s
Steps with Retry	1m 11s
Run in Child Context Large Data	57s
Map with Max Concurrency	54s
Map Operations	58s
Multiple Wait	1m 15s
Logger Example	56s
Wait for Condition	59s
Block Example	1m 6s
Callback	57s
Step with Name	1m 2s
Run in Child Context	1m 4s
Wait for Callback Failure	1m 4s
Simple Execution	1m 3s
Parallel with Wait	1m 8s
Parallel with Batch SerDes	1m 7s
Map with Batch SerDes	1m 9s
Wait State	1m 11s
Map with Failure Tolerance	1m 2s
Parallel with Max Concurrency	1m 5s
Map with Min Successful	58s
Parallel with Custom SerDes	56s
Map with Custom SerDes	1m 9s
Parallel with Failure Tolerance	1m 6s
Handler Error	1m 4s
	31m 0s

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