feat: improve workspace list perf

packages/backend/server/migrations/20251231145656_snapshot_size/migration.sql

@@ -0,0 +1,36 @@
+-- Add persisted size column for snapshots (nullable for backwards compatibility)
+ALTER TABLE "snapshots" ADD COLUMN IF NOT EXISTS "size" BIGINT;
+
+-- Ensure size is populated on insert/update even for older app versions
+CREATE OR REPLACE FUNCTION snapshots_set_size() RETURNS TRIGGER AS $$
+BEGIN
+  NEW."size" := COALESCE(NEW."size", octet_length(NEW."blob"));
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS snapshots_set_size_before_write ON "snapshots";
+CREATE TRIGGER snapshots_set_size_before_write
+BEFORE INSERT OR UPDATE OF "blob" ON "snapshots"
+FOR EACH ROW
+EXECUTE FUNCTION snapshots_set_size();
+
+-- Backfill existing rows
+UPDATE "snapshots"
+SET "size" = octet_length("blob")
+WHERE "size" IS NULL;
+
+-- Support faster admin aggregates
+CREATE INDEX IF NOT EXISTS "idx_wur_owner" ON "workspace_user_permissions" ("workspace_id")
+WHERE "type" = 99 AND "status" = 'Accepted'::"WorkspaceMemberStatus";
+
+CREATE INDEX IF NOT EXISTS "idx_wur_workspace" ON "workspace_user_permissions" ("workspace_id");
+
+CREATE INDEX IF NOT EXISTS "idx_blobs_active" ON "blobs" ("workspace_id")
+WHERE "deleted_at" IS NULL AND "status" = 'completed';
+
+CREATE INDEX IF NOT EXISTS "idx_workspace_pages_public" ON "workspace_pages" ("workspace_id")
+WHERE "public" = TRUE;
+
+CREATE INDEX IF NOT EXISTS "idx_workspace_features_activated" ON "workspace_features" ("workspace_id")
+WHERE "activated" = TRUE;