Superstate EA: extend result as per OPDATA-5112

[Subarna-Singh]

Closes #OPDATA-5112

https://smartcontract-it.atlassian.net/browse/OPDATA-5112

Description

Extend the Superstate external adapter to expose a single endpoint that returns NAV per share, AUM, and NAV date in one call (as opposed to the current separate endpoints) to conform the response to Data Streams conventions for v9 schema.

Changes

Modified result.data

Steps to Test

yarn test packages/source/superstate

Quality Assurance

• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file.
• If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• This is related to a maximum of one Jira story or GitHub issue.
• Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3194245

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@chainlink/superstate-adapter	Minor

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