Add close to credential storage

[octol]

Add close method to credential storage

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[tommyv1987]

Testing Completion Report: Add Close to Credential Store

Testing Completion Date: 08/01/2025

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Testing Steps Performed:

1. Review File: common/credential-storage/src/backends/sqlite.rs

   • Verified addition of close method for the SQLite backend

2. Review File: common/credential-storage/src/ephemeral_storage.rs

   • Confirmed addition of close method for ephemeral storage with no action required

3. Review File: common/credential-storage/src/persistent_storage/mod.rs

   • Ensured close method integration for persistent storage

4. Review File: common/credential-storage/src/storage.rs

   • Verified updates to the Storage trait to include close and cleanup_expired methods

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Validation:

• Test Passed
• Issues Found (Please specify below)

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Attachments (if applicable):

N/A