feat(rag): auto-index docs/map into the KB (#521)

docs/map is the agent-facing exhaustive codebase map (CLAUDE.md) but was never
RAG-indexed — only docs/rag was. Add it to OptimalService._auto_index_dirs so
every docs/map/*.md rides index_documentation (the generic _index_docs_directory
rglobs *.md and routes only the 'standards' subdir to the standards indexer) and
becomes roboco_kb_search-able. No map-specific branch needed.

Co-authored-by: Renn F <rennf93@users.noreply.github.com>

tests/unit/services/test_optimal_auto_index_map.py

@@ -0,0 +1,32 @@
+"""docs/map is auto-indexed alongside docs/rag.
+
+docs/map is the agent-facing exhaustive codebase map (CLAUDE.md); folding it
+into OptimalService._auto_index_docs's auto_index_dirs makes it
+roboco_kb_search-able. _index_docs_directory is generic (rglob *.md, route
+only the ``standards`` subdir to the standards indexer), so no map-specific
+branch is needed — every docs/map/*.md rides index_documentation like docs/rag.
+"""
+
+from __future__ import annotations
+
+from unittest.mock import AsyncMock, patch
+
+import pytest
+from roboco.services.optimal import IndexingReport, OptimalService
+
+
+@pytest.mark.asyncio
+async def test_auto_index_docs_includes_map_subdir() -> None:
+    """_auto_index_docs calls _index_docs_directory once per auto_index_dirs
+    entry that exists under the resolved docs root — and docs/map exists in
+    this repo, so the map call must fire. The subdir name is the 2nd positional
+    arg (target_dir, name, _force=force)."""
+    svc = object.__new__(OptimalService)
+    mock = AsyncMock(return_value=IndexingReport(index_type="docs/x"))
+
+    with patch.object(svc, "_index_docs_directory", new=mock):
+        await svc._auto_index_docs()
+
+    names = [c.args[1] for c in mock.call_args_list]
+    assert "rag" in names
+    assert "map" in names