"""Readers that turn a codebase into facts for the `code` reasoning module.

Each reader walks a tree in one language and produces the rows; `core` turns
rows into a program and owns the CLI. Adding a language is a walker, not a
second copy of the emitter.

    dke-ingest-python ./src > facts.dpy
    dke-ingest-cpp ./src ./include > facts.dpy

Both are lower bounds by construction: every edge they record is one the
source makes plain, and dynamic dispatch is not visible to a reader. Each
module says where its own limits are — read that before trusting a count.
"""