fix(campaign): remove stale mapper coupling

src/govoplan_campaign/backend/db/models.py

@@ -161,8 +161,6 @@ class RecipientImportMappingProfile(Base, TimestampMixin):
     value_separators: Mapped[str] = mapped_column(String(50), default=",;|", nullable=False)
     mappings: Mapped[list[dict[str, Any]]] = mapped_column(JSON, default=list, nullable=False)
 
-    owner: Mapped["User"] = relationship("User")
-
 
 class CampaignVersion(Base, TimestampMixin):
     __tablename__ = "campaign_versions"

src/govoplan_campaign/backend/persistence/campaigns.py

@@ -25,7 +25,7 @@ from govoplan_campaign.backend.db.models import (
     JobSendStatus,
     JobValidationStatus,
 )
-from govoplan_campaign.backend.campaign.loader import load_campaign_config, load_campaign_json, validate_against_schema
+from govoplan_campaign.backend.campaign.loader import load_campaign_json, validate_against_schema
 from govoplan_campaign.backend.campaign.validation import validate_campaign_config
 from govoplan_campaign.backend.messages.builder import build_campaign_messages
 from govoplan_campaign.backend.messages.models import MessageDraft