chore: import upstream snapshot with attribution

2026-07-13 13:32:57 +08:00
commit cd420f9332
4811 changed files with 884702 additions and 0 deletions
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+---
+area: webapp
+type: improvement
+---
+
+Add a `REALTIME_BACKEND_DEFAULT` env var to choose the default realtime backend (`electric`, `native`, or `shadow`) for environments whose org has no per-org override. Defaults to `electric`, so existing behavior is unchanged.