Add proper timeout handling and unify timeouts #2876
Description
We have various hardcoded timeouts in the codebase, or operations which can timoeout but not handled properly. This task is about two things:
- Review all existing timeouts and unify them with constants.ts/CosmosDBTimeouts as introduced with Opening a deleted Item loads indefinitely #2822 #2839
- Review all operations which might potentially timeout and add proper timeout handling.