feat: convert network-topology to a full plugin (B1)

drizzle/mysql/0032_lethal_marrow.sql

@@ -0,0 +1,4 @@
+-- network_topology moved to the network-topology plugin, which adopts (renames)
+-- this table in its own migration before this drizzle migration would run.
+-- No DROP here: it would delete every row before the plugin's rename applies.
+SELECT 1;