Fix/rest return body on create

cashu-gateway-rest/src/main/java/xyz/tcheeric/gateway/rest/config/RestExposureConfig.java

@@ -21,6 +21,10 @@ public void configureRepositoryRestConfiguration(RepositoryRestConfiguration con
         // Expose identifiers (useful for clients)
         config.exposeIdsFor(GatewayQuote.class, GatewayPayment.class);
 
+        // Return entity body on create/update so clients can rely on response payloads
+        config.setReturnBodyOnCreate(true);
+        config.setReturnBodyOnUpdate(true);
+
         var exposure = config.getExposureConfiguration();
 
         exposure.forDomainType(GatewayQuote.class)
@@ -44,4 +48,3 @@ public void configureRepositoryRestConfiguration(RepositoryRestConfiguration con
                         .enable(HttpMethod.DELETE));
     }
 }
-

cashu-gateway-rest/src/main/java/xyz/tcheeric/gateway/rest/repository/PaymentRepository.java

@@ -18,7 +18,8 @@
 @RepositoryRestResource(collectionResourceRel = "payments", path = "payment")
 public interface PaymentRepository extends PagingAndSortingRepository<GatewayPayment, Long> {
 
-    // Inherit save(...) from CrudRepository; do not redeclare to avoid compiler issues in some toolchains
+    // Explicitly declare save to satisfy RepositoryInvoker detection in some setups
+    <S extends GatewayPayment> S save(S entity);
 
     /**
      * Retrieves a payment by its external payment identifier.

cashu-gateway-rest/src/main/java/xyz/tcheeric/gateway/rest/repository/QuoteRepository.java

@@ -18,7 +18,8 @@
 @RepositoryRestResource(collectionResourceRel = "quotes", path = "quote")
 public interface QuoteRepository extends PagingAndSortingRepository<GatewayQuote, Long> {
 
-    // Inherit save(...) from CrudRepository; do not redeclare to avoid compiler issues in some toolchains
+    // Explicitly declare save to satisfy RepositoryInvoker detection in some setups
+    <S extends GatewayQuote> S save(S entity);
 
     /**
      * Retrieves a quote by its external quote identifier.