Say what the store actually does, and put a receipt under each claim

The README described a project that no longer exists: a Windows-only Qwen
runtime with nine read-only tools, a console as the only way to operate the
store, and a 100M-token capsule as if it were measured. It is now a description
of what is here, with the report and the command that re-measures each number,
and a section that names what has not been run instead of leaving the reader to
discover it.

TRAINING_ARTIFACTS.md keeps its artifact tables and loses the scores that were
never run: MMMU-Pro and OCRBench each read one sample, and the HashHop gate
collected proofs until it hit its target. What stays is annotated with what it
actually measures — citation accuracy there means the cited id existed in the
context that was handed over, not that the passage supports the answer.

Gaps.md gains a re-audit section: ten of the twelve gaps closed, two partial,
each row naming the command or report behind it, and the remaining work stated
plainly — the 0.90 recall bar is unmet and the deficit is entirely in the
visual and audio legs.

AGENTS.md stops being ignored. It records the constraints this repository paid
for: the measurement rules, the environment traps, and the review protocol, so
the next agent does not pay them again.

The CLI could filter by holder but could not look through a holder's eyes, so
search gains --as-holder: three states of eyes on every face, not two.

backend/tests/test_search_api.py

@@ -112,3 +112,8 @@ def test_the_cli_answers_in_json_a_machine_can_read(tmp_path: Path, monkeypatch:
 
     empty = json.loads(runner.invoke(app, ["search", "钥匙", "--scenario", "travel"]).stdout)
     assert empty["status"] == "no_match"
+
+    stranger = json.loads(runner.invoke(app, ["search", "钥匙", "--as-holder", "stranger"]).stdout)
+    assert stranger["status"] == "no_match", "--as-holder must show what a stranger would see"
+    owner = json.loads(runner.invoke(app, ["search", "钥匙", "--as-holder", "wife"]).stdout)
+    assert [hit["atom"]["text"] for hit in owner["hits"]] == [KEYS]