Add PostHog access review connector support

Introduce a PostHog access-review driver that lists organization\nmembers and maps role, MFA, and timestamp fields into account\nrecords.\n\nRegister PostHog as a builtin API-key connector provider and expose\nit through the connector provider enum so access-review source\ncreation can discover it.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

pkg/connector/provider/builtin.go

@@ -45,6 +45,7 @@ func NewBuiltinRegistry() *Registry {
 		notionRegistration(),
 		onePasswordRegistration(),
 		openaiRegistration(),
+		posthogRegistration(),
 		pagerdutyRegistration(),
 		resendRegistration(),
 		sentryRegistration(),