chore: add tests for lookaheadOffset #1375

Job	Run time
AsyncAPI Generation	1m 30s
Test Core	3m 34s
Build Core and publish docker image	8s
Publish Docs	4m 18s
Build gateways (playout-gateway)	9s
Typecheck and Lint Core	3m 33s
Build gateways (live-status-gateway)	11s
Check for multiple library versions	1m 28s
OpenAPI Generation	1m 32s
Test Package (main) (blueprints-integration, 22.x)	1m 24s
Test Package (main) (22.x, webui, true)	3m 14s
Test Package (main) (shared-lib, 22.x)	1m 19s
Test Package (main) (22.x, mos-gateway, true)	1m 23s
Test Package (main) (server-core-integration, 22.x)	1m 40s
Test Package (main) (22.x, corelib, true)	1m 45s
Build gateways (mos-gateway)	9s
Test Package (main) (openapi, 22.x)	1m 27s
Test Package (main) (22.x, job-worker, true)	3m 34s
Lint Package (shared-lib)	1m 13s
Lint Package (meteor-lib)	1m 34s
Lint Package (playout-gateway)	1m 21s
Test Package (main) (22.x, live-status-gateway, true)	1m 42s
Lint Package (live-status-gateway-api)	1m 8s
Lint Package (blueprints-integration)	1m 17s
Lint Package (webui)	2m 36s
Lint Package (job-worker)	2m 0s
Lint Package (server-core-integration)	1m 18s
Lint Package (corelib)	1m 29s
Test Package (main) (22.x, meteor-lib, true)	1m 48s
Lint Package (openapi)	1m 15s
Lint Package (mos-gateway)	1m 17s
Lint Package (live-status-gateway)	1m 40s
	53m 56s

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