writer: take --verbose without an argument, and say what -d takes

--verbose was declared required_argument while -v carries no colon in the getopt string,
so the long form consumed whatever followed it. "jfjoch_writer --verbose tcp://host:5400"
swallowed the address as the flag's argument and then failed for want of a data source -
the short form was fine, which is presumably why it went unnoticed.

The usage line for the root directory asked for <int>. It is a path.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

writer/jfjoch_writer.cpp

@@ -22,12 +22,13 @@ void print_usage() {
     logger.Info("Available options:");
     logger.Info("-T      | --tcp                      Use raw TCP/IP instead of ZeroMQ");
     logger.Info("-j<int> | --nproc=<int>              Number of forks (only with -T)");
-    logger.Info("-d<int> | --root_dir=<int>           Root directory for file writing");
+    logger.Info("-d<path>| --root_dir=<path>          Root directory for file writing");
     logger.Info("-r<int> | --zmq_repub_port=<int>     ZeroMQ port for PUSH socket to republish images");
     logger.Info("-f<int> | --zmq_file_port=<int>      ZeroMQ port for PUB socket to inform about finalized files");
     logger.Info("-w<int> | --rcv_watermark=<int>      Receiving ZeroMQ socket watermark (default = 100)");
     logger.Info("-W<int> | --repub_watermark=<int>    Republish ZeroMQ socket watermark (default = 1000)");
     logger.Info("-v      | --verbose                  Verbose output");
+    logger.Info("-h                                   This message");
     logger.Info("");
 }
 
@@ -80,7 +81,7 @@ int main(int argc, char **argv) {
             {"zmq_file_port", required_argument, 0, 'f'},
             {"rcv_watermark", required_argument, 0, 'w'},
             {"repub_watermark", required_argument, 0, 'W'},
-            {"verbose", required_argument, 0, 'v'},
+            {"verbose", no_argument, 0, 'v'},
             {"tcp", no_argument, 0, 'T'},
             {"nproc", required_argument, 0, 'j'},
             {0, 0, 0, 0}