remove phpstan exclusions

[leonstafford]

Szia @szepeviktor,

Could you please guide me around the src/Page typing? I'm confused how the Page's properties are being used. I'm breaking functionality when I try setting them to public or private with getter/setters. Seems some are used by the Model's DB mapping and others are used as in-memory only.

Előre is köszönöm~