GRA-1298: License check changes, free tier limits for saas (#2418)

* set free tier limits through config

* add host limit to config

* check for host limit on free tier

* fix license validation, replace node limit with hosts

* add hosts to telemetry data

* debug init

* validate license every 1hr

* hook manager, api to fetch server usage

* hook manager, server usage api

* encode json server usage api

* update ngork url

* update license validation endpoint

* avoid setting limits on eer

* adding hotfix

* correct users limits env var

* add comments to exported funcs

---------

Co-authored-by: afeiszli <alex.feiszli@gmail.com>

logic/telemetry.go

@@ -60,6 +60,7 @@ func sendTelemetry() error {
 		Event:      "daily checkin",
 		Properties: posthog.NewProperties().
 			Set("nodes", d.Nodes).
+			Set("hosts", d.Hosts).
 			Set("servers", d.Servers).
 			Set("non-server nodes", d.Count.NonServer).
 			Set("extclients", d.ExtClients).
@@ -84,6 +85,7 @@ func fetchTelemetryData() (telemetryData, error) {
 	data.ExtClients = getDBLength(database.EXT_CLIENT_TABLE_NAME)
 	data.Users = getDBLength(database.USERS_TABLE_NAME)
 	data.Networks = getDBLength(database.NETWORKS_TABLE_NAME)
+	data.Hosts = getDBLength(database.HOSTS_TABLE_NAME)
 	data.Version = servercfg.GetVersion()
 	data.Servers = getServerCount()
 	nodes, err := GetAllNodes()
@@ -167,6 +169,7 @@ func getDBLength(dbname string) int {
 // telemetryData - What data to send to posthog
 type telemetryData struct {
 	Nodes      int
+	Hosts      int
 	ExtClients int
 	Users      int
 	Count      clientCount