refactor(core): move database schema ownership (#29068)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

packages/core/src/share/sql.ts

@@ -0,0 +1,13 @@
+import { sqliteTable, text } from "drizzle-orm/sqlite-core"
+import { SessionTable } from "../session/sql"
+import { Timestamps } from "../database/schema.sql"
+
+export const SessionShareTable = sqliteTable("session_share", {
+  session_id: text()
+    .primaryKey()
+    .references(() => SessionTable.id, { onDelete: "cascade" }),
+  id: text().notNull(),
+  secret: text().notNull(),
+  url: text().notNull(),
+  ...Timestamps,
+})