Databases silently skip during Cloud to self-hosted migration

Hey team — wanted to flag a bug I hit migrating from Appwrite Cloud (FRA region, legacy DB) to self-hosted 1.9.0. It fails silently with no useful log/UI feedback so it's easy to miss. Patch inline.

Worth noting upfront: I kept the same project ID on both the Cloud project and the new self-hosted project (so any data referencing my user ID and other resource IDs would resolve cleanly).

Migration completes in <1s with statusCounters={} and errors=[] — but 0 databases come through, even though Users/Files/Functions/Messages all migrate fine.

Root cause: Migrations.php:243 hardcodes SourceAppwrite::SOURCE_DATABASE which makes the source's database reader read from the LOCAL project DB (via $projectDB) instead of via the Cloud API. Because I kept the same project ID, the local lookup hits my freshly-created self-hosted project — which is empty for databases — so the reader correctly returns 0 rows from the local DB and the migration finishes "successfully" with nothing transferred.

Users/messages/etc. don't go through the reader (they use SDK clients bound to the Cloud endpoint), which is why they migrate fine — and why this bug is database-specific and very confusing.

Fix in src/Appwrite/Platform/Workers/Migrations.php:

-    SourceAppwrite::SOURCE_DATABASE,
+    SourceAppwrite::SOURCE_API,

After applying this, my migration succeeded cleanly: 1 database / 3 tables / 21 columns / 1223 rows, 0 errors.

Thanks for Appwrite guys !