fix(agent): recover OpenResty runtime after invalid PID (#45)

* fix(agent): recover OpenResty runtime after invalid PID

* fix(agent): scope OpenResty shutdown to instance processes

---------

Co-authored-by: Noru Wyrms <wyrmsnoru@gmail.com>

internal/apps/agent/nginx/runtime_process_other.go

@@ -0,0 +1,19 @@
+//go:build !unix
+
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package nginx
+
+import (
+	"context"
+	"errors"
+)
+
+func inspectOpenrestyProcesses(_ context.Context, _, _ string) ([]runtimeProcess, error) {
+	return nil, errors.New("safe openresty process recovery is unsupported on this platform; refusing an unverified start")
+}
+
+func signalOpenrestyProcess(_ context.Context, _, _ string, _ runtimeProcess, _ bool) error {
+	return errors.New("safe openresty process signalling is unsupported on this platform")
+}