fix(opencode): enforce storage path invariants (#29666)

packages/core/src/session/sql.ts

@@ -1,4 +1,5 @@
 import { sqliteTable, text, integer, index, primaryKey, real } from "drizzle-orm/sqlite-core"
+import * as DatabasePath from "../database/path"
 import { ProjectTable } from "../project/sql"
 import type { SessionMessage } from "./message"
 import type { Snapshot } from "../snapshot"
@@ -24,8 +25,8 @@ export const SessionTable = sqliteTable(
     workspace_id: text().$type<WorkspaceV2.ID>(),
     parent_id: text().$type<SessionSchema.ID>(),
     slug: text().notNull(),
-    directory: text().notNull(),
-    path: text(),
+    directory: DatabasePath.directoryColumn().notNull(),
+    path: DatabasePath.pathColumn(),
     title: text().notNull(),
     version: text().notNull(),
     share_url: text(),