fix: filter out deleted orgs in org select

[nainglinnkhant]

Note

Low Risk
Small, localized client-side filtering change; risk is limited to potentially hiding orgs if the API sets deletedAt unexpectedly.

Overview
Updates listOrganizations to treat the API response as possibly including a deletedAt field and filters out any organizations with deletedAt set before returning results, preventing deleted orgs from showing up in the organization selection flow.

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