feat: grpc 기능 deep 구현

src/grpc-advanced/grpc-advanced-compat/build.gradle

@@ -0,0 +1,23 @@
+apply plugin: 'java-library'
+
+// Compatibility bridges: gRPC-Web, the Servlet HTTP/2 profile, the Spring Integration bridge, the
+// Reactor adapter, and the Kotlin coroutine/Flow boundary.
+//
+// No Kotlin source set (adaptation D7): this repository has no Kotlin toolchain, so the Kotlin lane
+// is expressed as a Java-side boundary contract whose compatibility gate fails closed until a real
+// toolchain lane exists. Everything the gate would otherwise assert — one schema source, coroutine
+// cancellation propagation, Flow backpressure inside the Stable buffer limits, evidence type
+// preservation — is a checkable contract without it.
+dependencies {
+    api project(':grpc:grpc-core-api')
+    api project(':grpc:grpc-policy')
+    api project(':grpc:grpc-server')
+    api project(':grpc:grpc-client')
+    api project(':grpc-advanced:grpc-advanced-bootstrap')
+
+    // api: the Reactor adapter's public signatures are Mono/Flux, and the Integration gateways name
+    // Spring Integration's Message. Hiding either would only stop an adopter compiling against the
+    // API this module documents.
+    api 'io.projectreactor:reactor-core'
+    api 'org.springframework.integration:spring-integration-core'
+}