fix(data-warehouse): schema status optional type

[EDsCODE]

Problem

• status is an optional type
• https://posthog.sentry.io/issues/5390662960/?project=1899813&query=&statsPeriod=1h&stream_index=12

Changes

• adjusts types and tests to account for when schema status isn't set

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

• manual and adjusted test to account for it

[github-actions[bot]]

Size Change: 0 B

Total Size: 1.06 MB

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| Filename | Size | | :--- | :---: | | `frontend/dist/toolbar.js` | 1.06 MB |

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