fix(webhook): update webhook endpoint path to include 'post'

config/variables.go

@@ -107,7 +107,7 @@ type ControllerMethodConfig struct {
 // WebhookEndpointConfig holds a single incoming webhook endpoint. Endpoints are
 // keyed by name under webhook.endpoints; the name is the last path segment of
 // the endpoint's URL, so an endpoint named "example" is served at
-// POST /api/webhook/example. One endpoint per external application and target
+// POST /api/webhook/post/example. One endpoint per external application and target
 // channel group keeps their tokens and recipients apart.
 type WebhookEndpointConfig struct {
 	// Enabled controls whether the endpoint accepts requests. A disabled