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-sqlite/src/sqlite-storage.ts

@@ -1,5 +1,5 @@
 import { Database } from 'bun:sqlite';
-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,
@@ -48,6 +48,11 @@ export class SQLiteStorage implements StorageProvider {
     listActiveStreamStates: ReturnType<Database['prepare']>;
     listActiveStreamStatesByDirection: ReturnType<Database['prepare']>;
     pruneStreamStates: ReturnType<Database['prepare']>;
+    savePeerVerification: ReturnType<Database['prepare']>;
+    getPeerVerification: ReturnType<Database['prepare']>;
+    removePeerVerification: ReturnType<Database['prepare']>;
+    getPeerIdentityVersion: ReturnType<Database['prepare']>;
+    upsertPeerIdentityVersion: ReturnType<Database['prepare']>;
   };
 
   constructor(dbPath?: string) {
@@ -111,6 +116,17 @@ export class SQLiteStorage implements StorageProvider {
       CREATE INDEX IF NOT EXISTS idx_stream_state_peer    ON stream_state(peer_address);
       CREATE INDEX IF NOT EXISTS idx_stream_state_updated ON stream_state(updated_at);
       CREATE INDEX IF NOT EXISTS idx_stream_state_status  ON stream_state(status, direction);
+      CREATE TABLE IF NOT EXISTS peer_verifications (
+        peer_address     TEXT PRIMARY KEY,
+        fingerprint      TEXT NOT NULL,
+        verified_at      INTEGER NOT NULL,
+        verified_by      TEXT NOT NULL,
+        identity_version INTEGER NOT NULL
+      );
+      CREATE TABLE IF NOT EXISTS peer_identity_versions (
+        peer_address TEXT PRIMARY KEY,
+        version      INTEGER NOT NULL
+      );
     `);
   }
 
@@ -153,6 +169,20 @@ export class SQLiteStorage implements StorageProvider {
       pruneStreamStates: this.db.prepare(
         "DELETE FROM stream_state WHERE status IN ('finished', 'aborted') AND updated_at < ?",
       ),
+      savePeerVerification: this.db.prepare(
+        `INSERT OR REPLACE INTO peer_verifications
+           (peer_address, fingerprint, verified_at, verified_by, identity_version)
+         VALUES (?, ?, ?, ?, ?)`,
+      ),
+      getPeerVerification: this.db.prepare(
+        'SELECT peer_address, fingerprint, verified_at, verified_by, identity_version FROM peer_verifications WHERE peer_address = ?',
+      ),
+      removePeerVerification: this.db.prepare('DELETE FROM peer_verifications WHERE peer_address = ?'),
+      getPeerIdentityVersion: this.db.prepare('SELECT version FROM peer_identity_versions WHERE peer_address = ?'),
+      upsertPeerIdentityVersion: this.db.prepare(
+        `INSERT INTO peer_identity_versions (peer_address, version) VALUES (?, ?)
+         ON CONFLICT(peer_address) DO UPDATE SET version = excluded.version`,
+      ),
     };
   }
 
@@ -320,6 +350,48 @@ export class SQLiteStorage implements StorageProvider {
   async pruneStreamStates(olderThan: number): Promise<void> {
     this.stmts.pruneStreamStates.run(olderThan);
   }
+
+  // ─── Peer verifications (V3.3) ────────────────────────────
+
+  async savePeerVerification(v: PeerVerification): Promise<void> {
+    this.stmts.savePeerVerification.run(
+      v.peerAddress,
+      v.fingerprint,
+      v.verifiedAt,
+      v.verifiedBy,
+      v.identityVersion,
+    );
+  }
+
+  async getPeerVerification(address: string): Promise<PeerVerification | null> {
+    const row = this.stmts.getPeerVerification.get(address) as
+      | { peer_address: string; fingerprint: string; verified_at: number | bigint; verified_by: string; identity_version: number | bigint }
+      | undefined;
+    if (!row) return null;
+    return {
+      peerAddress: row.peer_address,
+      fingerprint: row.fingerprint,
+      verifiedAt: Number(row.verified_at),
+      verifiedBy: row.verified_by as PeerVerificationSource,
+      identityVersion: Number(row.identity_version),
+    };
+  }
+
+  async removePeerVerification(address: string): Promise<void> {
+    this.stmts.removePeerVerification.run(address);
+  }
+
+  async getPeerIdentityVersion(address: string): Promise<number> {
+    const row = this.stmts.getPeerIdentityVersion.get(address) as { version: number | bigint } | undefined;
+    return row ? Number(row.version) : 1;
+  }
+
+  async bumpPeerIdentityVersion(address: string): Promise<number> {
+    const current = await this.getPeerIdentityVersion(address);
+    const next = current + 1;
+    this.stmts.upsertPeerIdentityVersion.run(address, next);
+    return next;
+  }
 }
 
 function rowToStreamState(row: any): PersistedStreamState {