Add python3-dirq as dependency for apel-ssm-service

The receiver has to use dirq when receiving as that's what the APEL
loader expects to find. Whereas the non-dirq sending is a convenience
for non-APEL client sites who just want to dump files into a directory
for sending without worrying about the dirq naming schema (so it is
optional).

scripts/ssm-build.sh

@@ -175,6 +175,7 @@ fpm -s pleaserun -t "$PACK_TYPE" \
 --no-auto-depends \
 --depends apel-ssm \
 --depends python3-daemon \
+--depends python3-dirq \
 --package "$BUILD_DIR" \
 /usr/bin/ssmreceive