New region request: Japan East (japaneast)

Region Request: Japan East

Requested region: Japan East (japaneast)

Use case

We are operating Azure workloads in Japan East, which is the primary region
for many Japanese enterprises and Microsoft's main Azure region in Japan.
Japan East offers the broadest service availability and the largest capacity
in the Japan geography.

We would like to deploy Azure SRE Agent in Japan East to:

• Meet data residency requirements for Japanese regulations (e.g., handling
  of operational data within Japan)
• Minimize latency between the SRE Agent and the monitored resources
  deployed in Japan East
• Align with our organization's region strategy that designates Japan East
  as the primary region for production workloads

Current workaround

We are currently forced to use australiaeast or koreacentral as the nearest
supported regions, which does not satisfy our data residency and latency
requirements.

References

• Supported regions – Azure SRE Agent
• Japan East is already available for many Azure AI/ML services, making it a
  natural fit for SRE Agent expansion.

Start with the Supported regions – Azure SRE Agent reference linked in the issue and inspect how the current region list is represented in the project. Determine the changes required to enable Japan East (japaneast); done means the region is supported without relying on the listed workarounds and the supported-regions information is updated.