Tag-locked APIs block deprecation of tag-based interior properties

Four public APIs can only be driven through interior property tags (edge_weight_t, edge_index_t, edge_capacity_t, etc.).
They do not accept an external property map, so users who model their data with bundled properties have no way to call them.

1. `maximum_weighted_matching` : would need a `WeightMap` parameter
2. `subgraph` : would need an `EdgeIndexMap` ctor arg
3. `randomize_property` : would need an overload with a property map
4. `read_dimacs_max_flow` / `_min_cut` : would need capacity/residual/reverse args

Until each grows an overload accepting property maps, tag-based interior properties cannot be deprecated (even if deprecation happens only in the documentation, that is hiding tags from new users) without breaking these four entry points.