examples: FireExample ORM class + round-trip test

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_examples_models.py

@@ -0,0 +1,43 @@
+"""Schema test — FireExample ORM round-trips through the in-memory engine."""
+from __future__ import annotations
+
+from datetime import date
+from decimal import Decimal
+
+import pytest
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from fire_planner.db import FireExample
+
+
+@pytest.mark.asyncio
+async def test_fire_example_round_trip(session: AsyncSession) -> None:
+    row = FireExample(
+        reddit_id="abc123",
+        source_sub="financialindependence",
+        post_url="https://reddit.com/r/financialindependence/abc123",
+        post_date=date(2026, 1, 1),
+        post_title="Hit £1m at 38, living in Manila",
+        country="Philippines",
+        city="Manila",
+        portfolio_gbp=Decimal("1000000.00"),
+        annual_exp_gbp=Decimal("14400.00"),
+        age=38,
+        family_size=2,
+        fi_status="FIRE",
+        is_retired=True,
+        raw_currency="GBP",
+        raw_excerpt="...£1m...Manila...",
+        llm_model="qwen3-8b",
+        llm_confidence=Decimal("0.82"),
+    )
+    session.add(row)
+    await session.commit()
+
+    result = await session.execute(select(FireExample).where(FireExample.reddit_id == "abc123"))
+    fetched = result.scalar_one()
+    assert fetched.country == "Philippines"
+    assert fetched.portfolio_gbp == Decimal("1000000.00")
+    assert fetched.fi_status == "FIRE"
+    assert fetched.is_retired is True