Remove host files and uninstall agent when deleting hosts

src/lib/server/hosts/schema.ts

@@ -40,6 +40,13 @@ export function ensureHostSchema(handle: Database.Database): void {
             PRIMARY KEY(host_id,bind_address,protocol,port)
         );
         CREATE INDEX IF NOT EXISTS ec_host_ports_instance ON ec_host_ports(instance_id);
+        CREATE TABLE IF NOT EXISTS ec_host_decommissions (
+            host_id TEXT PRIMARY KEY REFERENCES ec_hosts(id),
+            operation_id TEXT NOT NULL UNIQUE REFERENCES ec_host_operations(id),
+            token_hash TEXT NOT NULL, stage TEXT NOT NULL DEFAULT 'queued'
+                CHECK(stage IN ('queued','running','cleaned','failed','completed')),
+            requested_at TEXT NOT NULL, updated_at TEXT NOT NULL, cleaned_at TEXT, error TEXT
+        );
     `);
     const columns = handle.prepare('PRAGMA table_info(ec_host_operations)').all() as { name: string }[];
     if (!columns.some(column => column.name === 'last_delivered_at')) handle.exec('ALTER TABLE ec_host_operations ADD COLUMN last_delivered_at TEXT');