Use string in extensions Block Height to be consistent #3187

Bugbot Review

Bugbot Analysis Progress (7m 21s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (7m 11s)
✅ Posted analysis results (9s)

Final Result: Bugbot completed review and found 1 potential issue. 1 previously reported issue remain unresolved.

Request ID: serverGenReqId_1e215477-6bff-43cc-9310-2e574fb1b2d6

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

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