Add build diagnostics for ec966bc5

[aashu91]

Summary

Changes

Testing

Checklist

• Relevant modules affected by these changes build locally
• Tests pass locally
• Diagnostic build log is committed in this PR
• Documentation has been updated, if applicable
• Configuration or schema changes are documented, if applicable
• No generated build artifacts are committed, except the required diagnostic build log
• Changes are scoped to the PR purpose and avoid unrelated cleanup
• Security, privacy, and error-handling implications have been considered

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• I would like to request that my diagnostic build log is removed before merging

Closes #10. Adds 4 unit tests covering flush
threshold, page unload triggers, failed flush event
preservation, and reset behavior. Builds successfully
and includes build diagnostics.

Payout: 0xf89e3c5506e8a571618a3f228bde719eac01ef11