feat: add streamClose virtual callback

Add virtual streamClose(receptionId) callback invoked on successful
stream close (after response is fully sent). This allows derived
servers to capture the exact moment the response was committed.

Also add getReceptionId() getter to Stream.

Author: testillano

include/ert/http2comm/Http2Server.hpp

@@ -330,6 +330,13 @@ class Http2Server
     */
     virtual void streamError(uint32_t errorCode, const std::string &serverName, const std::uint64_t &receptionId, const nghttp2::asio_http2::server::request &req);
 
+    /**
+    * Virtual event for successful stream close (response sent)
+    *
+    * @param receptionId Unique reception identifier
+    */
+    virtual void streamClose(const std::uint64_t &receptionId) {;}
+
     /**
     * Virtual dynamic response delay in milliseconds
     *

include/ert/http2comm/Stream.hpp

@@ -117,6 +117,10 @@ class Stream : public ert::queuedispatcher::StreamIf
         reception_id_ = id;
     }
 
+    std::uint64_t getReceptionId() const {
+        return reception_id_;
+    }
+
     // append received data chunk
     void appendData(const uint8_t* data, std::size_t len);
 

src/Http2Server.cpp

@@ -267,6 +267,7 @@ nghttp2::asio_http2::server::request_cb Http2Server::handler()
             else
             {
                 stream->close();
+                streamClose(stream->getReceptionId()); // virtual
             }
         });
     };