feat(db): reviewed_real column on events (+ auto-migrate)

tests/test_reviewed_real_column.py

@@ -0,0 +1,14 @@
+import sqlite3
+from sfm.database import SeismoDb
+def _cols(db):
+    with sqlite3.connect(db.db_path) as c:
+        return {r[1] for r in c.execute("PRAGMA table_info(events)")}
+def test_fresh_db_has_reviewed_real(tmp_path):
+    assert "reviewed_real" in _cols(SeismoDb(tmp_path/"s.db"))
+def test_existing_db_migrates_reviewed_real(tmp_path):
+    p = tmp_path/"s.db"; db = SeismoDb(p)
+    with sqlite3.connect(p) as c:
+        c.execute("ALTER TABLE events DROP COLUMN reviewed_real")
+    assert "reviewed_real" not in _cols(db)      # dropped (read via existing handle/connection)
+    SeismoDb(p)                                   # re-open migrates
+    assert "reviewed_real" in _cols(SeismoDb(p))