[Option B] Create AudioStrategyFactory

[danieljsinclair]

Issue

Create AudioStrategyFactory to replace AudioModeFactory and AudioRendererFactory.

Background

Current architecture has separate factories for IAudioMode and IAudioRenderer. After consolidation to IAudioStrategy, we need a unified factory.

Goal

Create AudioStrategyFactory that:

• Creates IAudioStrategy instances based on configuration
• Supports ThreadedStrategy and SyncPullStrategy
• Injects required dependencies (IAudioHardwareProvider, logger)
• Provides clean API for strategy selection

Implementation Plan

1. Create AudioStrategyFactory.h/cpp
2. Implement createThreadedStrategy() method
3. Implement createSyncPullStrategy() method
4. Implement createStrategy() factory method (based on config)
5. Inject IAudioHardwareProvider and logger
6. Remove AudioModeFactory and AudioRendererFactory

Acceptance Criteria

1. AudioStrategyFactory.h/cpp created
2. Provides clean factory API for strategy creation
3. Supports both ThreadedStrategy and SyncPullStrategy
4. Injects IAudioHardwareProvider into strategies
5. Injects logger into strategies
6. All existing AudioModeFactory tests pass
7. Clean build with no warnings
8. AudioModeFactory and AudioRendererFactory removed

Testing

• Unit tests for AudioStrategyFactory
• Integration tests with CLIMain
• All smoke tests pass
• No behavioral changes

Dependencies

• CRITICAL: Documentation describes non-existent NEW architecture (IAudioStrategy) #8: Create IAudioStrategy interface
• Remove/accurately document SilentRenderer in architecture docs #9: Create IAudioHardwareProvider interface
• Clarify FillSilence location in architecture documentation #10: Consolidate ThreadedStrategy implementation
• Document actual pull model architecture (modes/renderers/factories) #11: Consolidate SyncPullStrategy implementation
• DECISION NEEDED: Choose architecture direction - Pull model vs NEW architecture #12: Create CoreAudioHardwareProvider implementation

Related Issues

• Archive and reference historical investigation docs #14: Update CLIMain wiring for IAudioStrategy