csv-parser: add CsvFormatTemplate model

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

tests/test_llm_csv_parser.py

@@ -0,0 +1,31 @@
+"""Unit + integration tests for the LLM-fallback CSV parser."""
+from __future__ import annotations
+
+import pytest
+
+
+def test_csv_format_template_model_columns():
+    """Model exposes every column the spec requires, with correct types."""
+    from sqlalchemy import inspect
+
+    from app.models import CsvFormatTemplate
+
+    cols = {c.name: c for c in inspect(CsvFormatTemplate).columns}
+    assert "fingerprint" in cols
+    assert "headers" in cols
+    assert "sample_row" in cols
+    assert "mapping" in cols
+    assert "preamble_rows" in cols
+    assert "delimiter" in cols
+    assert "broker_label" in cols
+    assert "first_seen_at" in cols
+    assert "use_count" in cols
+    assert "last_used_at" in cols
+    assert "llm_model" in cols
+    assert "llm_cost_usd" in cols
+    # Crucially, no user attribution.
+    assert "user_id" not in cols
+    assert "first_seen_user_id" not in cols
+    # Fingerprint is the cache key.
+    assert cols["fingerprint"].unique is True
+    assert cols["fingerprint"].nullable is False