feat(backend): recipe enrichment with side dishes & detailed instructions

- Add SideDish/SideDishIngredient schemas and recipe.side_dishes JSONB column
- Add recipe_enrichment.py service using Ollama LLM to:
  - Rewrite vague instructions with specific temps, quantities, timing, sauce breakdowns
  - Suggest 1-2 complementary side dishes with ingredients & prep notes
- Wire enrichment into recipe_ingestion.py discovery pipeline
- Add admin trigger endpoint /api/recipes/{id}/enrich for on-demand enrichment
- Migration 0014: Add side_dishes JSONB to recipe table
- Fix schemas/__init__.py imports: restore RecipeBase/Create/Read exports, add datetime/date for PydanticOptional compatibility
- Deployed to docker-willester and migrated to alembic 0014

backend/app/schemas/__init__.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from datetime import date, datetime
 from decimal import Decimal
 from enum import Enum
 from typing import Any, Dict, List, Optional

backend/app/schemas/recipe.py

@@ -14,6 +14,18 @@ class RecipeIngredientRef(BaseModel):
     notes: Optional[str] = None
 
 
+class SideDishIngredient(BaseModel):
+    name: str
+    qty: float
+    unit: Optional[str] = None
+
+
+class SideDish(BaseModel):
+    name: str
+    ingredients: List[SideDishIngredient]
+    prep_notes: Optional[str] = None
+
+
 class RecipeBase(BaseModel):
     name: str = Field(min_length=1, max_length=300)
     description: Optional[str] = None
@@ -49,6 +61,7 @@ class RecipeUpdate(BaseModel):
     calories_per_serving: Optional[int] = None
     ingredients: Optional[List[RecipeIngredientRef]] = None
     instructions: Optional[List[str]] = None
+    side_dishes: Optional[List[SideDish]] = None
 
 
 class RecipeRead(RecipeBase):
@@ -56,6 +69,7 @@ class RecipeRead(RecipeBase):
     external_source: Optional[str] = None
     external_id: Optional[str] = None
     discovery_reason: Optional[str] = None
+    side_dishes: List[SideDish] = Field(default_factory=list)
 
     model_config = {"from_attributes": True}