refactor: remove stream smoothing config from system settings and improve base image caching

- Remove stream_smoothing configuration from SystemConfigService (moved to handler default)
- Remove stream smoothing UI controls from admin settings page
- Add AdminClearSingleAffinityAdapter for targeted cache invalidation
- Add clearSingleAffinity API endpoint to clear specific affinity cache entries
- Include global_model_id in affinity list response for UI deletion support
- Improve CI/CD workflow with hash-based base image change detection
- Add hash label to base image for reliable cache invalidation detection
- Use remote image inspection to determine if base image rebuild is needed
- Include Dockerfile.base in hash calculation for proper dependency tracking

src/config/settings.py

@@ -143,7 +143,6 @@ class Config:
         # STREAM_STATS_DELAY: 统计记录延迟（秒），等待流完全关闭
         self.stream_prefetch_lines = int(os.getenv("STREAM_PREFETCH_LINES", "5"))
         self.stream_stats_delay = float(os.getenv("STREAM_STATS_DELAY", "0.1"))
-        # 注：流式平滑输出配置已移至数据库系统设置（stream_smoothing_*）
 
         # 验证连接池配置
         self._validate_pool_config()