app/services/gmail_service.py:76:        "No Google OAuth client configuration available. Import a client_secret.json in "
---ORDER---
        # Re-check suppression at send time (recipient may have unsubscribed since enqueue)
        sup = (db.execute(select(SuppressionEntry)
                          .where(SuppressionEntry.email == cr.email))).scalar_one_or_none()
        if sup:
            cr.status = "suppressed"
            campaign.suppressed_count += 1
            cr.last_error = "Suppressed at send time"
            db.add(EmailEvent(campaign_id=campaign.id, campaign_recipient_id=cr.id,
                              event_type="suppressed", detail="Suppressed at send time"))
            db.commit()
            _publish_progress(campaign.id)
            return {"ok": True, "status": "suppressed", "reason": "suppression hit"}

        account = db.get(GmailAccount, cr.assigned_account_id) if cr.assigned_account_id else None
        if account is None or not account.is_active or account.status != "authorized":
            cr.status = "skipped"
            campaign.skipped_count += 1
            cr.last_error = "Assigned account unavailable/unauthorized"
            db.commit()
            _publish_progress(campaign.id)
            return {"ok": False, "status": "skipped", "reason": "account unavailable"}

        # Per-account daily cap (never exceed provider limits)
        today = now().date()
        if account.last_send_date and account.last_send_date.date() == today \
                and account.sends_today >= account.daily_limit:
            campaign.status = "paused"
            db.commit()
            _publish_control(campaign.id, "pause",
                             f"Account {account.email} reached daily limit ({account.daily_limit})")
            return {"ok": False, "status": "paused", "reason": "daily limit reached"}

        if account.cooldown_until and account.cooldown_until > now():
            _reschedule(db, self, campaign.id, cr, job, account.cooldown_until - now(),
                        "account cooling down")
            return {"ok": False, "status": "rescheduled", "reason": "cooldown"}