source-oracle: skip retention checks for new databases

[mdibaiee]

Description:

• If a database is less than 24 hours old, skip retention checks because they will fail. This is mostly useful for demos and customers trialing on staging/test instances.

Workflow steps:

(How does one use this feature, and how has it changed)

Documentation links affected:

(list any documentation links that you created, or existing ones that you've identified as needing updates, along with a brief description)

Notes for reviewers:

(anything that might help someone review this PR)

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This change is 

[Alex-Bair]

LGTM