feat: complete pre-ai local completion v3

tests/test_local_validation.py

@@ -0,0 +1,19 @@
+import json
+
+from scripts.run_local_validation import build_validation_report
+
+
+def test_validation_report_is_deterministic_and_write_free(tmp_path):
+    artifacts = {
+        "preflight": {"status": "PASS"},
+        "company_context": {"status": "PASS"},
+        "deterministic_engine": {"status": "PASS"},
+        "ai_ready": {"status": "PREPARED", "writes": 0},
+    }
+
+    first = build_validation_report(artifacts)
+    second = build_validation_report(json.loads(json.dumps(artifacts)))
+
+    assert first == second
+    assert first["firebird_writes"] == 0
+    assert first["status"] == "PASS"

tests/test_rollback_run.py

@@ -0,0 +1,25 @@
+from scripts.rollback_run import preview_records
+
+
+def test_rollback_preview_is_scoped_and_detects_drift():
+    records = [{
+        "run_id": "run-1", "db": "ACME", "product_code": "P1",
+        "fields": {"IPI": {"before": "0", "after": "5"}}, "outcome": "SUCCEEDED",
+    }]
+
+    preview = preview_records(records, run_id="run-1", database="ACME", field="IPI", product="P1",
+                              current={("ACME", "P1", "IPI"): "4"})
+
+    assert preview[0]["target"] == "0"
+    assert preview[0]["affected_rows"] == 1
+    assert preview[0]["status"] == "CONFLICT"
+    assert preview[0]["reason"] == "current != expected_after"
+
+
+def test_rollback_preview_does_not_include_other_runs_or_fields():
+    records = [
+        {"run_id": "run-1", "db": "ACME", "product_code": "P1", "fields": {"IPI": {"before": "0", "after": "5"}}, "outcome": "SUCCEEDED"},
+        {"run_id": "run-2", "db": "ACME", "product_code": "P1", "fields": {"CEST": {"before": "1", "after": "2"}}, "outcome": "SUCCEEDED"},
+    ]
+
+    assert len(preview_records(records, run_id="run-1", database="ACME", field="IPI")) == 1