feat(core): finalize session event lifecycle (#35272)

packages/core/src/database/migration.gen.ts

@@ -44,6 +44,7 @@ export const migrations = (
     import("./migration/20260703090000_reset_v2_event_rename_sweep"),
     import("./migration/20260703181610_event_created_column"),
     import("./migration/20260703190000_reset_v2_shell_event_payloads"),
+    import("./migration/20260703200000_reset_v2_session_events"),
     import("./migration/20260705180000_rename_instructions"),
   ])
 ).map((module) => module.default) satisfies DatabaseMigration.Migration[]

packages/core/src/database/migration/20260703200000_reset_v2_session_events.ts

@@ -0,0 +1,14 @@
+import { Effect } from "effect"
+import type { DatabaseMigration } from "../migration"
+
+export default {
+  id: "20260703200000_reset_v2_session_events",
+  up(tx) {
+    return Effect.gen(function* () {
+      yield* tx.run(`DELETE FROM \`session_input\`;`)
+      yield* tx.run(`DELETE FROM \`session_message\`;`)
+      yield* tx.run(`DELETE FROM \`event\`;`)
+      yield* tx.run(`DELETE FROM \`event_sequence\`;`)
+    })
+  },
+} satisfies DatabaseMigration.Migration