feat: never-suggest CRUD endpoints (ingredient and recipe blocklist)

backend/app/schemas/never_suggest.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+from typing import Optional
+from uuid import UUID
+
+from pydantic import BaseModel, Field, model_validator
+
+
+class NeverSuggestCreate(BaseModel):
+    family_profile_id: UUID
+    ingredient_id: Optional[UUID] = None
+    recipe_id: Optional[UUID] = None
+    reason: Optional[str] = Field(default=None, max_length=50)
+    notes: Optional[str] = None
+
+    @model_validator(mode="after")
+    def _exactly_one_target(self) -> "NeverSuggestCreate":
+        present = sum(x is not None for x in (self.ingredient_id, self.recipe_id))
+        if present != 1:
+            raise ValueError("exactly one of ingredient_id or recipe_id must be set")
+        return self
+
+
+class NeverSuggestRead(BaseModel):
+    id: UUID
+    family_profile_id: UUID
+    ingredient_id: Optional[UUID] = None
+    recipe_id: Optional[UUID] = None
+    reason: Optional[str] = None
+    notes: Optional[str] = None
+
+    model_config = {"from_attributes": True}