feat(packaging): compress rotated log files on alpine linux

misc/packaging/openrc/emissary-agent.logrotate.conf

@@ -1,6 +1,8 @@
 /var/log/emissary/agent.log {
 	missingok
 	sharedscripts
+	compress
+	rotate 7
 	postrotate
 		/etc/init.d/emissary-agent restart
 	endscript

misc/packaging/openrc/emissary-server.logrotate.conf

@@ -1,6 +1,8 @@
 /var/log/emissary/server.log {
 	missingok
 	sharedscripts
+	compress
+	rotate 7
 	postrotate
 		/etc/init.d/emissary-server restart
 	endscript