refactor: remove unused neo4j_memory_logs source and update gitea domains

ansible/alloy/miranda/config.alloy.j2

@@ -79,20 +79,6 @@ loki.source.syslog "neo4j_cypher_logs" {
   forward_to = [loki.write.default.receiver]
 }
 
-loki.source.syslog "neo4j_memory_logs" {
-  listener {
-    address  = "127.0.0.1:{{neo4j_memory_syslog_port}}"
-    protocol = "tcp"
-    syslog_format = "{{ syslog_format }}"
-    labels = {
-      job = "neo4j-memory",
-      hostname = "{{inventory_hostname}}",
-      environment = "{{deployment_environment}}",
-    }
-  }
-  forward_to = [loki.write.default.receiver]
-}
-
 loki.source.syslog "gitea_mcp_logs" {
   listener {
     address  = "127.0.0.1:{{gitea_mcp_syslog_port}}"