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

src/backend/database/db/index.ts

@@ -1745,30 +1745,6 @@ const migrateSchema = () => {
     }
   }
 
-  try {
-    sqlite
-      .prepare("SELECT id FROM network_topology LIMIT 1")
-      .get();
-  } catch {
-    try {
-      sqlite.exec(`
-        CREATE TABLE IF NOT EXISTS network_topology (
-          id INTEGER PRIMARY KEY AUTOINCREMENT,
-          user_id TEXT NOT NULL,
-          topology TEXT,
-          created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
-          updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
-          FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE
-        );
-      `);
-    } catch (createError) {
-      databaseLogger.warn("Failed to create network_topology table", {
-        operation: "schema_migration",
-        error: createError,
-      });
-    }
-  }
-
   try {
     sqlite.prepare("SELECT role_id FROM host_access LIMIT 1").get();
   } catch {