Add browser deploy recon backend with port scan, web crawl, and deploy lane recommendations.

POST /api/v1/recon/scan probes fleet ports from the server host, crawls owned HTTP targets, maps findings to spread lanes, and records optional oath ledger rows.

server/web/src/help/uiHelp.test.ts

@@ -110,6 +110,9 @@ describe('UI_HELP', () => {
     'set_webhook',
     'ui_color_scheme',
     'crucible_section_spread_templates',
+    'dr_overview',
+    'dr_port_matrix',
+    'dr_path_prefix',
   ] as const;
 
   it('defines help for every documented UI key', () => {