Protect monitoring PF API with internal key

internal/pf/config.go

@@ -15,6 +15,7 @@ type Config struct {
 	ScrapeIntervalHours int
 	TGBotToken          string
 	TGBotUsername       string
+	InternalAPIKey      string
 	WorkerPython        string
 	WorkerModule        string
 }
@@ -28,6 +29,7 @@ func LoadConfig() Config {
 		ScrapeIntervalHours: max(1, envInt("SCRAPE_INTERVAL_HOURS", 4)),
 		TGBotToken:          env("TG_BOT_TOKEN", ""),
 		TGBotUsername:       strings.TrimPrefix(env("TG_BOT_USERNAME", ""), "@"),
+		InternalAPIKey:      env("INTERNAL_API_KEY", env("PORTAL_INTERNAL_API_KEY", "")),
 		WorkerPython:        env("WORKER_PYTHON", "python"),
 		WorkerModule:        env("WORKER_MODULE", "app.worker"),
 	}