fix: Improve type safety by adding const qualifiers to function parameters in logging and enhance read loop handling in HTTP2

src/http2.c

@@ -46,7 +46,7 @@ static ssize_t file_read_callback(nghttp2_session* session, int32_t stream_id,
     int fd = source->fd;
     ssize_t nread;
 
-    while ((nread = read(fd, buf, length)) == -1 && errno == EINTR);
+    while ((nread = read(fd, buf, length)) == -1 && errno == EINTR) {}
 
     if (nread == -1)
     {