Serialize configured agent resolution

Author: seanwessmith

internal/config/loader.go

@@ -1703,6 +1703,9 @@ func ResolveRoleAgentName(role, townRoot, rigPath string) (agentName string, isR
 // flows like hooks sync and doctor checks that need the intended provider and
 // template even before the runtime is installed locally.
 func ResolveRoleConfiguredAgentConfig(role, townRoot, rigPath string) *RuntimeConfig {
+	resolveConfigMu.Lock()
+	defer resolveConfigMu.Unlock()
+
 	var rigSettings *RigSettings
 	if rigPath != "" {
 		var err error