fix: Use new discovery URLs method #1930

Job	Run time
typescript / Check Typescript E2E tests	30s
typescript / Check Typescript chatbot	30s
python / Check Python chatbot	16s
typescript / Check Typescript library	43s
python / Check Python library	55s
python / Check Python E2E tests	16s
cdk / Check Python-based Book Search Server	2m 8s
cdk / Check Python-based MCP Doc Server	2m 15s
cdk / Check Typescript-based Weather Alerts Server	1m 39s
cdk / Check Python-based Dad Jokes Server	2m 2s
cdk / Check Python-based Time Server	2m 2s
cdk / Check Python-based Zen Server	58s
cdk / Check Typescript-based Cognito stack	24s
cdk / Check Typescript-based Cat Facts Server	1m 34s
cdk / Check Typescript-based Dog Facts Server	1m 35s
cdk / Check Typescript-based Dictionary Server	1m 36s
	19m 23s

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