[framework] TxCore → common-framework (ACM-FW-001)

boot/common-framework/src/main/java/com/klaro/acquirecore/framework/TxService.java

@@ -0,0 +1,18 @@
+package com.klaro.acquirecore.framework;
+
+/**
+ * Functional interface for transactional service operations.
+ * Represents a single unit of work within a transaction context.
+ */
+@FunctionalInterface
+public interface TxService {
+
+    /**
+     * Execute the service operation within the given transaction context.
+     *
+     * @param ctx   the transaction context
+     * @param input the input data for the operation
+     * @return the result of the operation
+     */
+    Object execute(TxContext ctx, Object input);
+}