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-storage-postgres/src/postgres-storage.ts

@@ -1,5 +1,5 @@
 import postgres, { type Sql } from 'postgres';
-import type { StorageProvider, IdentityKeyPair, SignedPreKey, OneTimePreKey, SessionState, RetiredIdentity, PersistedStreamState } from '@shade/core';
+import type { StorageProvider, IdentityKeyPair, SignedPreKey, OneTimePreKey, SessionState, RetiredIdentity, PersistedStreamState, PeerVerification, PeerVerificationSource } from '@shade/core';
 import {
   toBase64, fromBase64,
   constantTimeEqual,
@@ -264,6 +264,59 @@ export class PostgresStorage implements StorageProvider {
       WHERE status IN ('finished','aborted') AND updated_at < ${olderThan}
     `;
   }
+
+  // ─── Peer verifications (V3.3) ────────────────────────────
+
+  async savePeerVerification(v: PeerVerification): Promise<void> {
+    await this.sql`
+      INSERT INTO shade_peer_verifications
+        (peer_address, fingerprint, verified_at, verified_by, identity_version)
+      VALUES (${v.peerAddress}, ${v.fingerprint}, ${v.verifiedAt}, ${v.verifiedBy}, ${v.identityVersion})
+      ON CONFLICT (peer_address) DO UPDATE SET
+        fingerprint = EXCLUDED.fingerprint,
+        verified_at = EXCLUDED.verified_at,
+        verified_by = EXCLUDED.verified_by,
+        identity_version = EXCLUDED.identity_version
+    `;
+  }
+
+  async getPeerVerification(address: string): Promise<PeerVerification | null> {
+    const rows = await this.sql<Array<{ peer_address: string; fingerprint: string; verified_at: string; verified_by: string; identity_version: string }>>`
+      SELECT peer_address, fingerprint, verified_at, verified_by, identity_version
+      FROM shade_peer_verifications WHERE peer_address = ${address}
+    `;
+    if (rows.length === 0) return null;
+    const r = rows[0]!;
+    return {
+      peerAddress: r.peer_address,
+      fingerprint: r.fingerprint,
+      verifiedAt: Number(r.verified_at),
+      verifiedBy: r.verified_by as PeerVerificationSource,
+      identityVersion: Number(r.identity_version),
+    };
+  }
+
+  async removePeerVerification(address: string): Promise<void> {
+    await this.sql`DELETE FROM shade_peer_verifications WHERE peer_address = ${address}`;
+  }
+
+  async getPeerIdentityVersion(address: string): Promise<number> {
+    const rows = await this.sql<Array<{ version: string }>>`
+      SELECT version FROM shade_peer_identity_versions WHERE peer_address = ${address}
+    `;
+    return rows.length ? Number(rows[0]!.version) : 1;
+  }
+
+  async bumpPeerIdentityVersion(address: string): Promise<number> {
+    const current = await this.getPeerIdentityVersion(address);
+    const next = current + 1;
+    await this.sql`
+      INSERT INTO shade_peer_identity_versions (peer_address, version)
+      VALUES (${address}, ${next})
+      ON CONFLICT (peer_address) DO UPDATE SET version = EXCLUDED.version
+    `;
+    return next;
+  }
 }
 
 function rowToStreamState(row: Record<string, unknown>): PersistedStreamState {