fix(report): persist longform appendix on self-hosted upsert (BUG-576)

Engine calls already returned markdown; the worker failed because local postgres upsert required onConflict and the appendix write omitted it.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_api_server_security.py

@@ -217,6 +217,7 @@ def test_health_endpoint_exposes_runtime_accuracy_metadata() -> None:
     assert payload['ayanamsa_default'] == 'raman'
     assert 'swisseph_available' in payload
     assert 'swisseph_version' in payload
+    assert 'git_commit' in payload
     assert payload['vedastro']['configured'] is False
     assert payload['vedastro']['network_enabled'] is False
     assert payload['vedastro']['has_api_key'] is False