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/internal/ai/oath_recorder.go

@@ -9,6 +9,7 @@ const (
 	OathCourtL4Decision      = "court_l4_decision"
 	OathSpreadAttempt        = "spread_attempt"
 	OathStrainHospice        = "strain_hospice"
+	OathReconScan            = "recon_scan"
 
 	OathOutcomeSuccess = "success"
 	OathOutcomeFail    = "fail"