[Subgraph] New schema implementation

[leric7]

Description

Subgraph schemas are re-defined based on new design of Job Launcher, and Escrow Dashboard.
https://app.diagrams.net/#G1WCSJhsWy4irN0wgxlPbePcT0uN5pbtTx

Summary of changes

• Updated subgraph schema definition
• Updated subgraph handlers to properly save data
• Updated Node SDK to properly handle changed subgraph schema
• Updated test cases

How test the changes

Related issues

Keywords for linking issues

Closes #721

Operational checklist

• All new functionality is covered by tests
• Any related documentation has been changed or added

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Name	Status	Preview	Comments	Updated (UTC)
escrow-dashboard	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
faucet-server	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-exchange-oracle	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-exchange-oracle-server	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-job-launcher-client	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-job-launcher-server	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-recording-oracle	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
fortune-reputation-oracle	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2023 2:58pm
job-launcher-client	❌ Failed (Inspect)			Aug 18, 2023 2:58pm

[portuu3]

can we create a new subgraph and deploy it? I would suggest to use mumbai
check lint errors