docs: add STATUS.md handoff (architecture, verification record, gotchas, remaining work)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

README.md

@@ -56,4 +56,17 @@ Tests: `cd server && npm test`.
 
 Everything lives in named docker volumes: `podpuddle-data` (SQLite, server nostr key,
 covers), `mediamtx-recordings` (stream recordings, 7-day retention), `blossom-data`
-(media blobs).
+(media blobs). `docker compose down` keeps them; `down -v` wipes them.
+
+## Verification
+
+- Unit tests: `cd server && npm test` (35 tests).
+- Against a running stack: `node scripts/e2e.mjs` (14 checks: login, blossom
+  upload, feed, stream keys, MediaMTX auth webhook).
+
+## Status & internals
+
+See **[docs/STATUS.md](docs/STATUS.md)** for the architecture, the full
+verification record, known gotchas (blossom v4 config nesting, no range
+requests, split-horizon blossom URL, MediaMTX polling rationale), and the
+remaining-work list (Archipelago packaging, git remote).