DF-20362 Update/cbp delay balance POC

[mmcallister-cll]

Closes #DF-20362

Description

Added delay logic to CBP balance endpoint to avoid "blips"

Changes

• added secondary delay "blipCache" in mem
• logic to determine when a value is considered "good"
• this is done as a POC in a balance2 endpoint for now

Steps to Test

1. Steps
2. to
3. test

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 or update the soak testing blacklist.
• [ ] 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.

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Latest commit: 027d2bcd9dab5877aa8654fe4181ff5b9fdf1635

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