fix: execute mit optionalen Params, release(error) bei reset-Fehler, Tests ergänzt

src/server/db/tenant.test.ts

@@ -62,6 +62,27 @@ describe('withTenant', () => {
     await withTenant('abc123', async (client) => {
       await client.execute('DELETE FROM sessions WHERE expired = true')
     })
-    expect(mockClient.query).toHaveBeenCalledWith('DELETE FROM sessions WHERE expired = true')
+    expect(mockClient.query).toHaveBeenCalledWith('DELETE FROM sessions WHERE expired = true', undefined)
+  })
+
+  it('execute akzeptiert optionale Parameter', async () => {
+    await withTenant('abc123', async (client) => {
+      await client.execute('UPDATE t SET x = $1 WHERE id = $2', ['v', '1'])
+    })
+    expect(mockClient.query).toHaveBeenCalledWith('UPDATE t SET x = $1 WHERE id = $2', ['v', '1'])
+  })
+
+  it('zerstört Verbindung bei search_path-Reset-Fehler (kein Recycling)', async () => {
+    mockClient.query
+      .mockResolvedValueOnce({ rows: [] }) // SET search_path = tenant_...
+      .mockResolvedValueOnce({ rows: [] }) // fn-query
+      .mockRejectedValueOnce(new Error('reset-fehler')) // SET search_path = public schlägt fehl
+
+    await withTenant('abc123', async (client) => {
+      await client.query('SELECT 1', [])
+    })
+
+    // release() muss mit Error aufgerufen worden sein (Verbindung zerstört, nicht recycelt)
+    expect(mockClient.release).toHaveBeenCalledWith(expect.any(Error))
   })
 })