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-transport-bridge/src/index.ts

@@ -0,0 +1,38 @@
+/**
+ * @shade/transport-bridge — V3.7
+ *
+ * Transport-agnostic delivery for environments that cannot or will not run
+ * a WebSocket: SSE primary fallback, long-poll secondary, plus a thin WS
+ * adapter for the happy path. All three implementations surface the same
+ * {@link IncomingMessage} shape so application code stays portable.
+ *
+ * Server-side routes live in `@shade/inbox-server`'s `createBridgeRoutes`.
+ * Both ends share the same auth scheme: signed query parameters using the
+ * recipient's Ed25519 signing key, verified against the address-owner key
+ * registered via `/v1/inbox/register`.
+ */
+
+export type {
+  IncomingMessage,
+  IncomingMessageHandler,
+  BridgeConnectOptions,
+  BridgeTransport,
+  BridgeWireMessage,
+} from './types.js';
+export { decodeWireMessage } from './types.js';
+
+export { BridgeError } from './errors.js';
+
+export { signBridgeQuery, bridgeQueryToCanonical } from './auth.js';
+export type { BridgeKind, BridgeAuthInput } from './auth.js';
+
+export { SseBridge } from './sse-bridge.js';
+export type { SseBridgeOptions } from './sse-bridge.js';
+
+export { LongPollBridge } from './long-poll-bridge.js';
+export type { LongPollBridgeOptions } from './long-poll-bridge.js';
+
+export { WsBridge } from './ws-bridge.js';
+export type { WsBridgeOptions } from './ws-bridge.js';
+
+export { FallbackBridgeTransport } from './fallback.js';