fix: 通过 Constants 类获取首次认证策略类型.

通过 Constants 类获取首次认证策略类型, 以修复类型无法获取的问题.

src/main/java/net/lamgc/oracle/sentry/Constants.java

@@ -0,0 +1,28 @@
+package net.lamgc.oracle.sentry;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.lang.NonNull;
+import org.springframework.stereotype.Component;
+
+/**
+ * @author LamGC
+ */
+@Component("sentry.constants")
+public final class Constants {
+
+    public static Constants instance;
+
+    private Constants() {
+        instance = this;
+    }
+
+    @Value("${oracle.ssh.firstConnection.authenticationPolicy}")
+    @NonNull
+    private String firstConnectionPolicy;
+
+
+    @NonNull
+    public String getFirstConnectionPolicy() {
+        return firstConnectionPolicy;
+    }
+}