fix(campaign): align adaptive handbook with shipped UI

src/govoplan_campaign/backend/router.py

@@ -3264,10 +3264,11 @@ def send_campaign_now_endpoint(
 ):
     _get_campaign_for_principal(session, campaign_id, principal, write=True)
     _require_permission(principal, "campaigns:recipient:read")
-    """Validate/build/queue and synchronously send a small campaign version.
+    """Validate/build/queue and synchronously send every eligible job.
 
-    This endpoint is intentionally conservative and suitable for a first small
-    test campaign. Larger campaigns should use the queue/Celery flow.
+    No server-side job-count bound is currently enforced. Ordinary batches
+    must use the queue/Celery flow; this endpoint is for deliberately small
+    interactive runs.
     """
 
     payload = payload or SendCampaignNowRequest()