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"