fix(history-db): treat SQLITE_CANTOPEN as readonly WAL retry error

- Add `sqlite_cantopen` and `unable to open database file` to `isReadonlyWalRetryError` checks
- Cover `SQLITE_CANTOPEN` case in test

launcher/history-db.ts

@@ -58,7 +58,9 @@ export function isReadonlyWalRetryError(error: unknown, dbPath: string): boolean
   return (
     text.includes('readonly') ||
     text.includes('read-only') ||
-    text.includes('attempt to write a readonly database')
+    text.includes('attempt to write a readonly database') ||
+    text.includes('sqlite_cantopen') ||
+    text.includes('unable to open database file')
   );
 }
 

launcher/history.test.ts

@@ -300,6 +300,15 @@ test('isReadonlyWalRetryError only accepts readonly errors from WAL-mode databas
       ),
       true,
     );
+    assert.equal(
+      isReadonlyWalRetryError(
+        Object.assign(new Error('unable to open database file'), {
+          code: 'SQLITE_CANTOPEN',
+        }),
+        walDbPath,
+      ),
+      true,
+    );
     assert.equal(
       isReadonlyWalRetryError(new Error('no such table: imm_sessions'), walDbPath),
       false,