21.2 review remediation: pause-spin, OQ7 comment, rename, C2 cross-check

Skip the back-pressure interop poll while paused (UC5). Document complete()
draining the stash in full by design. Rename scheduler isProductionPaused to
evaluateProductionPause (latch-advancing); window exposure name unchanged.

DeepDrftPublic/Interop/audio/AudioPlayer.ts

@@ -144,7 +144,7 @@ export class AudioPlayer {
                 this.opusDecoder = new OpusStreamDecoder(
                     this.contextManager,
                     this.pendingOpusSidecar,
-                    () => this.scheduler.isProductionPaused());
+                    () => this.scheduler.evaluateProductionPause());
                 return { success: true };
             }
 
@@ -275,7 +275,7 @@ export class AudioPlayer {
                 headerParsed,
                 bufferCount: this.scheduler.getBufferCount(),
                 duration: this.duration,
-                productionPaused: this.scheduler.isProductionPaused()
+                productionPaused: this.scheduler.evaluateProductionPause()
             };
         } catch (error) {
             return { success: false, error: (error as Error).message };
@@ -320,7 +320,7 @@ export class AudioPlayer {
                 headerParsed: this.streamDecoder.headerParsed,
                 bufferCount: this.scheduler.getBufferCount(),
                 duration: this.duration,
-                productionPaused: this.scheduler.isProductionPaused()
+                productionPaused: this.scheduler.evaluateProductionPause()
             };
         } catch (error) {
             return { success: false, error: (error as Error).message };
@@ -529,7 +529,7 @@ export class AudioPlayer {
      * interop hop until back-pressure actually engages.
      */
     isProductionPaused(): boolean {
-        return this.scheduler.isProductionPaused();
+        return this.scheduler.evaluateProductionPause();
     }
 
     /**