feat(audio): implement phase 3c master protection

test/phase3-audio.test.mjs

@@ -1,3 +1,4 @@
+import { fakeProtectionFactory } from './helpers/protection-fake.mjs';
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import {
@@ -485,7 +486,7 @@ test('every node type realizes against an AudioContext stand-in and disposes cle
   voice.dispose();
   assert.equal(context.log.stopped, context.log.started);
 
-  const subsystem = new AudioSubsystem({ document, rng: new SeededRNG(42), contextFactory: () => mockContext() });
+  const subsystem = new AudioSubsystem({ document, rng: new SeededRNG(42), protectionFactory: fakeProtectionFactory, contextFactory: () => mockContext() });
   await subsystem.unlock();
   const handle = subsystem.play('probe');
   assert.equal(handle.soundId, 'probe');
@@ -867,7 +868,7 @@ test('trace 10: eviction order is followed at ceiling, WARN_VOICE_LIMIT raised,
   const subsystem = new AudioSubsystem({
     document: doc,
     rng: new SeededRNG(42),
-    contextFactory: () => mockContext(),
+    protectionFactory: fakeProtectionFactory, contextFactory: () => mockContext(),
     diagnostics,
     voiceLimits: limits
   });
@@ -954,7 +955,7 @@ test('trace 11: disposal releases all nodes/connections/buffers, and a FINISHED
   const subsystem = new AudioSubsystem({
     document: doc,
     rng: new SeededRNG(42),
-    contextFactory: () => context,
+    protectionFactory: fakeProtectionFactory, contextFactory: () => context,
     voiceLimits: { oneshot: 2, continuous: 2 }
   });
   await subsystem.unlock();