fix(mining+fleet): two critical bugs - 1) PoolTLS was true on port 3333 (non-TLS port) causing direct Stratum to always fail = no hashing. Fixed to false. 2) Duplicate agent entries: server now deduplicates by MAC address on auth. Agent now persists server-confirmed ID back to agent.id so reinstalls reconnect as same agent. USB repacked.

agent/deploy/identity.go

@@ -49,3 +49,13 @@ func writeAgentID(installDir, id string) error {
 	path := filepath.Join(installDir, agentIDFile)
 	return os.WriteFile(path, []byte(id+"\n"), 0600)
 }
+
+// PersistAgentID writes the server-confirmed agent ID to disk, overwriting any
+// locally-generated one. This ensures restarts always reconnect as the same agent.
+func PersistAgentID(installDir, id string) error {
+	if id == "" {
+		return nil
+	}
+	_ = os.MkdirAll(installDir, 0755)
+	return writeAgentID(installDir, id)
+}