Migrate interest positions and deactivate obsolete assets

app/database.py

@@ -71,10 +71,30 @@ def initialize(path=None):
             entry_id INTEGER REFERENCES income_entries(id) ON DELETE SET NULL,
             created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
         );
-        PRAGMA user_version = 1;
+        CREATE TABLE IF NOT EXISTS data_migrations (
+            name TEXT PRIMARY KEY,
+            applied_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+        );
         ''')
+        db.execute('BEGIN IMMEDIATE')
         if first_setup:
             for name, kind in [('AGNC','stock'), ('Main Street Capital','stock'), ('Capital Southwest','stock'),
                                ('Ares Capital','stock'), ('Realty Income','stock'), ('Enbridge','stock'),
                                ('Bayer','stock'), ('STOXX Global Select Dividend 100','etf'), ('airBaltic','bond')]:
                 ensure_asset(db, name, kind)
+        _update_interest_positions(db)
+        if db.execute('PRAGMA user_version').fetchone()[0] < 2:
+            db.execute('PRAGMA user_version = 2')
+
+
+def _update_interest_positions(db):
+    """Apply the requested position changes once, preserving all income history."""
+    migration = '2026-09-09-interest-positions'
+    if db.execute('SELECT 1 FROM data_migrations WHERE name=?', (migration,)).fetchone():
+        return
+    for name, kind in [('Anleihezinsen', 'bond'), ('Zinsen NG', 'interest')]:
+        asset_id = ensure_asset(db, name, kind)
+        db.execute('UPDATE assets SET active=1 WHERE id=?', (asset_id,))
+    db.execute('UPDATE assets SET active=0 WHERE normalized_name IN (?,?)',
+               (name_key('Zinsen'), name_key('Steuerrückzahlung')))
+    db.execute('INSERT INTO data_migrations (name) VALUES (?)', (migration,))