feat: Add session status checker API

[fregataa]

Add GQL mutation and POST /session/_/transit-status API to check and update the status of session

Request

curl --location --request POST 'MANAGER_ADDR/session/_/transit-status' \
--header 'Content-Type: application/json' \
--data '{
    "id": "SESSION_ID"
}'

Response

{"session_status": "RUNNING"}

Checklist: (if applicable)

• Milestone metadata specifying the target backport version
• API server-client counterparts (e.g., manager API -> client SDK)

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📚 Documentation preview 📚: https://sorna--2312.org.readthedocs.build/en/2312/

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📚 Documentation preview 📚: https://sorna-ko--2312.org.readthedocs.build/ko/2312/

[fregataa]

• feat: Add session status checker API #2312 : 2 dependent PRs (#2646 , #2836 ) 👈
• refactor: revamp update mechanism of session & kernel status #2311
• feat: Add interface that update session and kernel status #2581
• main

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