chore: remove duplicate lighthouse settings model

api/src/backend/api/models.py

@@ -2249,96 +2249,3 @@ class LighthouseProviderModels(RowLevelSecurityProtectedModel):
 
     class JSONAPIMeta:
         resource_name = "lighthouse-models"
-
-
-class LighthouseSettings(RowLevelSecurityProtectedModel):
-    """
-    Stores tenant-level Lighthouse settings including business context and defaults.
-    """
-
-    id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
-    inserted_at = models.DateTimeField(auto_now_add=True, editable=False)
-    updated_at = models.DateTimeField(auto_now=True, editable=False)
-
-    business_context = models.TextField(
-        blank=True,
-        default="",
-        help_text="Business context for all AI model configurations in this tenant",
-    )
-
-    default_provider = models.CharField(
-        max_length=50,
-        blank=True,
-        null=True,
-        help_text="Default LLM provider for this tenant",
-    )
-
-    default_model = models.CharField(
-        max_length=100,
-        blank=True,
-        null=True,
-        help_text="Default model name for the selected provider",
-    )
-
-    def clean(self):
-        super().clean()
-
-        # Normalize empty strings to None for consistency
-        if self.default_provider == "":
-            self.default_provider = None
-        if self.default_model == "":
-            self.default_model = None
-
-        # Cross-field validation: default_model requires default_provider
-        if self.default_model and not self.default_provider:
-            raise ModelValidationError(
-                detail="Default model cannot be set without specifying a default provider",
-                code="model_requires_provider",
-                pointer="/data/attributes/default_model",
-            )
-
-        # Validate that default_provider exists in LighthouseConfiguration if set
-        if self.default_provider:
-            if not LighthouseConfiguration.objects.filter(
-                tenant_id=self.tenant_id,
-                model_provider=self.default_provider,
-                is_active=True,
-            ).exists():
-                raise ModelValidationError(
-                    detail=f"No active configuration found for provider '{self.default_provider}'",
-                    code="invalid_default_provider",
-                    pointer="/data/attributes/default_provider",
-                )
-
-        # Validate that default_model is valid for the provider if both are set
-        if self.default_provider and self.default_model:
-            from api.v1.serializers import PROVIDER_ALLOWED_MODELS
-
-            allowed_models = PROVIDER_ALLOWED_MODELS.get(self.default_provider, [])
-            if self.default_model not in allowed_models:
-                raise ModelValidationError(
-                    detail=f"Invalid model '{self.default_model}' for provider '{self.default_provider}'. "
-                    f"Allowed models: {', '.join(allowed_models)}",
-                    code="invalid_model_for_provider",
-                    pointer="/data/attributes/default_model",
-                )
-
-    def __str__(self):
-        return f"Lighthouse Settings for {self.tenant_id}"
-
-    class Meta(RowLevelSecurityProtectedModel.Meta):
-        db_table = "lighthouse_settings"
-
-        constraints = [
-            RowLevelSecurityConstraint(
-                field="tenant_id",
-                name="rls_on_%(class)s",
-                statements=["SELECT", "INSERT", "UPDATE", "DELETE"],
-            ),
-            models.UniqueConstraint(
-                fields=["tenant_id"], name="unique_lighthouse_settings_per_tenant"
-            ),
-        ]
-
-    class JSONAPIMeta:
-        resource_name = "lighthouse-settings"