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-server/src/index.ts

@@ -4,11 +4,18 @@ import { createPrekeyRoutes } from './routes.js';
 import { MemoryPrekeyStore } from './memory-store.js';
 import type { PrekeyStore } from './store.js';
 import type { PrekeyServerEvents } from './events.js';
+import {
+  KeyTransparencyService,
+  type KeyTransparencyConfig,
+} from './kt-integration.js';
 
 export { createPrekeyRoutes } from './routes.js';
 export { MemoryPrekeyStore } from './memory-store.js';
 export type { PrekeyStore } from './store.js';
 export { verifyPayload, signPayload, canonicalizePayload, validateAddress } from './auth.js';
+export { KeyTransparencyService, encodeSthForWire, encodeProofForWire } from './kt-integration.js';
+export type { KeyTransparencyConfig } from './kt-integration.js';
+export { createKTRoutes } from './kt-routes.js';
 
 /**
  * Create a standalone Shade Prekey Server.
@@ -29,6 +36,8 @@ export function createPrekeyServer(options: {
   store?: PrekeyStore;
   disableRateLimit?: boolean;
   events?: PrekeyServerEvents;
+  /** Existing KT service (already initialized via `KeyTransparencyService.create`). */
+  keyTransparency?: KeyTransparencyService;
 }): Hono {
   const store = options.store ?? new MemoryPrekeyStore();
   const routesOptions: Parameters<typeof createPrekeyRoutes>[2] = {};
@@ -38,9 +47,35 @@ export function createPrekeyServer(options: {
   if (options.events !== undefined) {
     routesOptions.events = options.events;
   }
+  if (options.keyTransparency !== undefined) {
+    routesOptions.keyTransparency = options.keyTransparency;
+  }
   return createPrekeyRoutes(store, options.crypto, routesOptions);
 }
 
+/**
+ * Convenience: create both the KT service and the prekey server in one call.
+ * Async because `KeyTransparencyService.create` reads existing state.
+ */
+export async function createPrekeyServerWithKT(options: {
+  crypto: CryptoProvider;
+  store?: PrekeyStore;
+  disableRateLimit?: boolean;
+  events?: PrekeyServerEvents;
+  keyTransparency: KeyTransparencyConfig;
+}): Promise<{ app: Hono; kt: KeyTransparencyService }> {
+  const kt = await KeyTransparencyService.create(options.crypto, options.keyTransparency);
+  const passOpts: Parameters<typeof createPrekeyServer>[0] = {
+    crypto: options.crypto,
+    keyTransparency: kt,
+  };
+  if (options.store !== undefined) passOpts.store = options.store;
+  if (options.disableRateLimit !== undefined) passOpts.disableRateLimit = options.disableRateLimit;
+  if (options.events !== undefined) passOpts.events = options.events;
+  const app = createPrekeyServer(passOpts);
+  return { app, kt };
+}
+
 export { RateLimiter, MemoryRateLimitStore } from './rate-limit.js';
 export type { RateLimitStore, RateLimitConfig } from './rate-limit.js';
 export { PrekeyServerEvents, shortHash as serverShortHash } from './events.js';