docs/draft-flowchart-schema.md: four of six Key files are gone, and save_agent_draft appears nowhere but this document

docs/draft-flowchart-schema.md lists six Key files. Four are not in the repository, and the tool the document writes JSON schemas for cannot be found under that name either.

Measured against f71da3fb on main.

The Key files list, checked one at a time:

And the names themselves are gone, not just the paths. Each of these appears in exactly one file in the whole repository, which is this document:

$ git grep -l save_agent_draft main
docs/draft-flowchart-schema.md
$ git grep -l flowchart_utils main
docs/draft-flowchart-schema.md
$ git grep -l DraftGraph main
docs/draft-flowchart-schema.md
$ git grep -l routes_graphs main
docs/draft-flowchart-schema.md

save_agent_draft is the tool this document specifies the input and output schema for, so that one matters most: the schema has nothing left to be the schema of.

One thing I checked so as not to overstate it. The word "draft" is alive across the repository, but in a different sense. queen_lifecycle_tools.py is one of the two surviving Key files and the document credits it with "draft creation, dissolution"; its nine mentions of draft are all build_draft and write_skill from framework.skills.skill_writer, which is a SKILL draft, not an agent draft rendered as a flowchart. So I am not claiming the feature was deleted. I am saying its anchors are all gone and I cannot tell from outside whether it was renamed or removed.

That is the part only you can answer, which is why this is an issue and not a patch. Either the names moved and the document needs the new ones, or the capability went and the document outlived it.

Related: #7383 and #7384, from the same pass over the docs.

Found with docproof, which checks what documentation claims against what the repository actually contains.