Add membership and host to user webhook payload

Nest membership ID, role, and state into a membership sub-object
in the user webhook payload. Also emit user:updated webhook when
the membership role is changed. Add X-Probo-Webhook-Host header
to webhook HTTP calls. Skip delete webhook when membership is
not found in SCIM user deletion.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/webhook/sender.go

@@ -43,6 +43,7 @@ type (
 		logger         *log.Logger
 		httpClient     *http.Client
 		encryptionKey  cipher.EncryptionKey
+		host           string
 		cache          sync.Map
 		cacheCreatedAt time.Time
 		cacheTTL       time.Duration
@@ -60,6 +61,7 @@ type (
 		Timeout       time.Duration
 		CacheTTL      time.Duration
 		EncryptionKey cipher.EncryptionKey
+		Host          string
 	}
 
 	pendingDelivery struct {
@@ -88,6 +90,7 @@ func NewSender(pg *pg.Client, logger *log.Logger, cfg Config) *Sender {
 		logger:         logger,
 		httpClient:     httpclient.DefaultPooledClient(httpclient.WithLogger(logger)),
 		encryptionKey:  cfg.EncryptionKey,
+		host:           cfg.Host,
 		cacheCreatedAt: time.Now(),
 		cacheTTL:       cfg.CacheTTL,
 		interval:       cfg.Interval,
@@ -310,6 +313,7 @@ func (s *Sender) doHTTPCall(
 	req.Header.Set("X-Probo-Webhook-Organization-Id", webhookData.OrganizationID.String())
 	req.Header.Set("X-Probo-Webhook-Timestamp", timestamp)
 	req.Header.Set("X-Probo-Webhook-Signature", signature)
+	req.Header.Set("X-Probo-Webhook-Host", s.host)
 
 	resp, err := s.httpClient.Do(req)
 	if err != nil {