updates oauth with new access list for kyb

[varsha766]

Title

Provide a short, descriptive title of the change (50 characters max recommended).

• Added new access for /oauth api for access kyb apis by thirdparty customer.

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Summary

One-paragraph summary describing what the change does and why. Link related issue(s) or design docs.

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Background / Motivation

Explain the context, problem being solved, and any alternatives considered. Include links to design docs, issues, or RFCs.

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Scope of Changes

• Files / modules affected (high level)
• Public API changes (if any)
• Database / schema / migration impact (if any)

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Type

• Feature
• Bugfix
• Docs
• Refactor
• Tests
• Performance
• Build / CI / Config

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Implementation

Describe the approach taken, key design decisions, and why.

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Testing & QA

• Units / integration tests added: describe coverage and important test cases
• Manual / exploratory test steps for QA
• CI matrix: platforms/versions validated

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Migration / Rollout Plan

• Data migrations and downtime expectations
• Backwards compatibility notes
• Feature flags and staged rollout instructions

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Security / Privacy Considerations

List any security implications, new secrets, or compliance-related items.

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Performance Impact

Any benchmark results or expected performance regressions/improvements.

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Release Notes (for changelog)

One-line summary suitable for release notes / CHANGELOG.

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Checklist (required)

• Linked issue or ticket present (link: )
• Target branch is correct
• PR description explains the why, not just the what
• Code compiles and tests pass locally
• Unit and integration tests added where applicable
• Documentation updated (README, docs site, comments)
• CHANGELOG.md (or repo-specific changelog) updated with an entry
• package.json / package version updated if publishing a release
• No secrets or credentials committed
• Security review completed if required
• Performance benchmarks included if applicable
• Migration steps included if applicable

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Reviewer Guidance

List the specific areas you want reviewers to focus on (e.g., security, migration, public API, edge cases). Provide commands or steps to run the project locally to validate the change:

# checkout PR branch
git checkout $BRANCH
# run tests
npm ci && npm test
# run lint
npm run lint

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Acceptance Criteria

Define the minimal conditions that must be true for this PR to be merged (e.g., tests pass, performance threshold met, migration completed).

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Approvals

• At least one approving review from code owners
• CI status checks are green
• Any required manual QA sign-off