feat: add spring ai retrieval sidecar

src/main/java/com/superbiz/agent/config/RagSidecarProperties.java

@@ -0,0 +1,23 @@
+package com.superbiz.agent.config;
+
+import lombok.Getter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Getter
+@Configuration
+@ConfigurationProperties(prefix = "rag.sidecar.spring-ai")
+public class RagSidecarProperties {
+
+    private boolean enabled = false;
+
+    private int contentPreviewLimit = 300;
+
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+
+    public void setContentPreviewLimit(int contentPreviewLimit) {
+        this.contentPreviewLimit = contentPreviewLimit;
+    }
+}