CSV streamer: always terminate a hit row with a newline

The row newline was emitted only in the else branch of the
double-observables loop, so a hit whose detector schema has no double
observables (empty dmap) never entered the loop body and produced no
newline — concatenating that row with the next one. Move the newline to
after the loop, written exactly once per hit, matching the header row's
existing logic. Applies to event/publishDigitized.cc,
event/publishTrueInfo.cc, and run/publishDigitized.cc.

Verified: the normal (doubles-present) path is unchanged — the gstreamer
CSV example still produces rows with consistent column counts and
newline termination.

Fixes #129

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: zhaozhiwen

gemc/gstreamer/factories/CSV/event/publishDigitized.cc

@@ -54,8 +54,8 @@ bool GstreamerCsvFactory::publishEventDigitizedDataImpl(const std::string&
 			for (const auto& [variableName, value] : dmap) {
 				ofile_digitized << value;
 				if (++i < total) ofile_digitized << ", ";
-				else ofile_digitized << "\n";
 			}
+			ofile_digitized << "\n";
 		}
 	}
 

gemc/gstreamer/factories/CSV/event/publishTrueInfo.cc

@@ -55,8 +55,8 @@ bool GstreamerCsvFactory::publishEventTrueInfoDataImpl(const std::string&
 			for (const auto& [variableName, value] : dmap) {
 				ofile_true_info << value;
 				if (++i < total) ofile_true_info << ", ";
-				else ofile_true_info << "\n";
 			}
+			ofile_true_info << "\n";
 		}
 	}
 

gemc/gstreamer/factories/CSV/run/publishDigitized.cc

@@ -55,8 +55,8 @@ bool GstreamerCsvFactory::publishRunDigitizedDataImpl(const std::string&
 			for (const auto& [variableName, value] : dmap) {
 				ofile_digitized << value;
 				if (++i < total) ofile_digitized << ", ";
-				else ofile_digitized << "\n";
 			}
+			ofile_digitized << "\n";
 		}
 	}