chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/durable/test/setup-document-retention.ts

@@ -0,0 +1,7 @@
+// Loaded by vitest for every test file: `PI_DURABLE_DOCUMENT_RETENTION_MS` sets the document retention of every Session
+// that keeps the default, so the suite can run with each unattached document evicted right after use
+// (`npm run test:evicting`).
+import { setDefaultDocumentRetention } from "../src/session/session.ts";
+
+const forced = process.env.PI_DURABLE_DOCUMENT_RETENTION_MS;
+if (forced !== undefined) setDefaultDocumentRetention(Number(forced));