新增内容，新增拉起软件层

backend-java/src/main/java/com/nanri/aiimage/config/SimilarAsinProperties.java

@@ -83,6 +83,7 @@ public class SimilarAsinProperties {
      * 出现淘汰过频影响命中率时可上调到 512MB；2GB 堆约束下不建议超过 768MB。
      */
     private long imageCacheMaxBytes = 256L * 1024L * 1024L;
+    private boolean imageDbCacheEnabled = false;
 
     /**
      * 是否在 Coze 请求 parameters 中附带 api_key 字段。

backend-java/src/main/java/com/nanri/aiimage/config/TaskImageCacheCleanupProperties.java

@@ -12,4 +12,6 @@ public class TaskImageCacheCleanupProperties {
     private int retentionDays = 3;
     private int batchSize = 5000;
     private int maxBatchesPerRun = 200;
+    private long maxBytes = 2L * 1024L * 1024L * 1024L;
+    private long targetBytes = 1L * 1024L * 1024L * 1024L;
 }

backend-java/src/main/java/com/nanri/aiimage/config/TransientStorageProperties.java

@@ -17,4 +17,25 @@ public class TransientStorageProperties {
     private int writeTimeoutSeconds = 60;
     private int uploadMaxRetries = 3;
     private int readMaxRetries = 3;
+    private int deleteMaxRetries = 3;
+    private int maxConcurrentUploads = 16;
+    private int maxConcurrentReads = 32;
+    private int maxConcurrentDeletes = 8;
+    private long acquirePermitTimeoutMillis = 2000;
+    private long baseRetryDelayMillis = 500;
+    private long maxRetryDelayMillis = 5000;
+    private long retryJitterMillis = 250;
+    private long failureWindowSeconds = 60;
+    private int failureWindowThreshold = 20;
+    private long failureCooldownMillis = 10000;
+    private int connectionPoolMaxIdle = 0;
+    private long connectionPoolKeepAliveMillis = 1;
+    private long warnPayloadBytes = 5L * 1024 * 1024;
+    private long maxPayloadBytes = 50L * 1024 * 1024;
+    private long maxStoredPayloadBytes = 50L * 1024 * 1024;
+    private boolean fallbackToLocalOnOversize = true;
+    private boolean deleteRetryEnabled = true;
+    private String deleteRetryCron = "0 */5 * * * *";
+    private int deleteRetryQueueCapacity = 10000;
+    private int deleteRetryBatchSize = 200;
 }