fix: client-secret -> secret 필드 변경

pennyway-infra/src/main/java/kr/co/pennyway/infra/common/oidc/OauthOidcClientProperties.java

@@ -3,5 +3,5 @@
 public interface OauthOidcClientProperties {
     String getJwksUri();
 
-    String getClientSecret();
+    String getSecret();
 }

pennyway-infra/src/main/java/kr/co/pennyway/infra/common/properties/AppleOidcProperties.java

@@ -10,5 +10,5 @@
 @ConfigurationProperties(prefix = "oauth2.client.provider.apple")
 public class AppleOidcProperties implements OauthOidcClientProperties {
     private final String jwksUri;
-    private final String clientSecret;
+    private final String secret;
 }

pennyway-infra/src/main/java/kr/co/pennyway/infra/common/properties/GoogleOidcProperties.java

@@ -10,5 +10,5 @@
 @ConfigurationProperties(prefix = "oauth2.client.provider.google")
 public class GoogleOidcProperties implements OauthOidcClientProperties {
     private final String jwksUri;
-    private final String clientSecret;
+    private final String secret;
 }

pennyway-infra/src/main/java/kr/co/pennyway/infra/common/properties/KakaoOidcProperties.java

@@ -10,5 +10,5 @@
 @ConfigurationProperties(prefix = "oauth2.client.provider.kakao")
 public class KakaoOidcProperties implements OauthOidcClientProperties {
     private final String jwksUri;
-    private final String clientSecret;
+    private final String secret;
 }