CodeBench: qwen3:8b primary-rooliin, FK-esimerkit code-small promptissa

profiles.json: role-kenttä (primary/backup/minimal/retired).
code-small.md: lisätty konkreettinen FK-pattern ja testi-esimerkki
relaatioille — 8b:n blog-skenaario kaatui koska ei osannut FK:ta.

kipina-codebench/prompts/code-small.md

@@ -15,6 +15,34 @@ Key patterns (copy from reference):
 - model_dump() not dict()
 - POST 201, GET list, GET by id 404, PUT, DELETE 204
 
+FOREIGN KEYS (when spec has relationships):
+- Child entity gets parent_id field: Mapped[int] = mapped_column(ForeignKey("parents.id"))
+- Import ForeignKey: from sqlalchemy import ForeignKey
+- Create schema includes parent_id: int
+- Test creates parent FIRST, then child with parent's id
+
+Example FK pattern in models.py:
+```
+class Author(Base):
+    __tablename__ = "authors"
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    name: Mapped[str] = mapped_column(String(255))
+
+class Post(Base):
+    __tablename__ = "posts"
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    title: Mapped[str] = mapped_column(String(255))
+    author_id: Mapped[int] = mapped_column(ForeignKey("authors.id"))
+```
+
+Example FK test pattern:
+```
+def test_create_post():
+    author = client.post("/authors/", json={"name": "Kirjailija"}).json()
+    response = client.post("/posts/", json={"title": "Artikkeli", "author_id": author["id"]})
+    assert response.status_code == 201
+```
+
 CRITICAL:
 - Use ONLY fields from the JSON spec — no created_at or extra fields
 - Generate EXACTLY 6 tests per entity: create, list, get_by_id, not_found, update, delete