No bare-point ontology

Physical points are not primitive E_0-atoms and not coordinate tuples of τ^3. Either move would re-import the Cartesian point ontology that the construction has refused from the start. A physical site must instead be earned from relational structure internal to τ. This refusal is constructive: it forces Book III to identify a localization object that carries boundary, interior, and morphism data at once, rather than merely occupying a position in a pre-given space.