release(v4.0.0): Shade GA — V3.x consolidation + audit prep

V3.1 → V3.12 consolidated and tagged for the first GA release. Wire
format unchanged from 0.4.x — 4.0 peers interoperate with 0.4.x peers
byte-for-byte. The version bump is semantic: audit-cycle complete,
opt-in surface fully exposed, threat model refreshed for every new
surface.

Highlights:
- All 24 @shade/* packages bumped to 4.0.0 in lockstep.
- CHANGELOG 4.0.0 section is the canonical manifest of what landed.
- THREAT-MODEL extended (§10 fingerprint gates, §11 WebRTC P2P, §12
  Web-Worker boundary) + residual-risks table refreshed.
- OpenAPI now covers all 27 routes: prekey, transfer, KT, inbox,
  bridge, observer, /metrics, /healthz, /ready.
- MIGRATION 0.3.x → 4.0 documented + smoke-tested against
  shade migrate-storage on a real SQLite DB.
- docs/audit/REVIEW-BUNDLE.md + SCOPE.md ready for external reviewer.
- scripts/soak.ts harness for the GA-stable 2-week soak window.
- All V*.md plans archived under docs/archive/ with Status: Done.
- Voice/Video carved out into V5.0; 4.0 audit focuses on the frozen
  non-realtime stack.

Tests: TS 1000/1000 + Kotlin 11/11 cross-platform vectors green.
Docker: gt.zyon.no/stian/shade-prekey:4.0.0 builds and reports
  version 4.0.0 on /health.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/shade-cli/templates/bun-server/README.md

@@ -39,8 +39,23 @@ curl -X POST http://localhost:3000/receive \
 
 Returns the decrypted plaintext.
 
+## Stream-state retention
+
+Resumable file transfers persist a per-stream record. The template runs
+a daily cron that drops anything idle for more than
+`SHADE_STREAM_RETENTION_DAYS` days (default **14**). Override at
+deploy:
+
+```bash
+SHADE_STREAM_RETENTION_DAYS=7 bun run start
+```
+
+See [`docs/streams.md`](../../../../docs/streams.md) § Retention for the
+full guidance and tuning per use case.
+
 ## Next steps
 
 - Wire a real delivery layer (WebSocket, HTTP push, etc.)
 - Run `shade dashboard` to watch live activity
 - Compare fingerprints with peers out-of-band before trusting sessions
+- Walk through [`docs/PRODUCTION-CHECKLIST.md`](../../../../docs/PRODUCTION-CHECKLIST.md) before going live

packages/shade-cli/templates/bun-server/src/index.ts

@@ -22,6 +22,28 @@ shade.onMessage((from, msg) => {
   console.log(`[${from}] ${msg}`);
 });
 
+// ─── Resumable-stream retention ──────────────────────────────────
+//
+// Drop stream-state records older than SHADE_STREAM_RETENTION_DAYS
+// (default 14d). See docs/streams.md § Retention. Override the
+// horizon with the env var; cron interval is fixed at 24h.
+const STREAM_RETENTION_DAYS = Number(process.env.SHADE_STREAM_RETENTION_DAYS ?? 14);
+const ONE_DAY_MS = 24 * 60 * 60 * 1000;
+const HORIZON_MS = STREAM_RETENTION_DAYS * ONE_DAY_MS;
+
+async function pruneStreamStatesOnce(): Promise<void> {
+  try {
+    await shade.pruneStreamStates(Date.now() - HORIZON_MS);
+  } catch (err) {
+    console.error('[shade] pruneStreamStates failed:', err);
+  }
+}
+
+await pruneStreamStatesOnce();
+const streamPruneTimer = setInterval(pruneStreamStatesOnce, ONE_DAY_MS);
+// Don't keep the process alive for the timer alone.
+if (typeof streamPruneTimer.unref === 'function') streamPruneTimer.unref();
+
 const app = new Hono();
 
 app.get('/', (c) => c.text(`__PROJECT_NAME__ — Shade-enabled backend`));