feat(discovery): style golden queries; dimstyle/textstyle set_current and drawing_apply_standard join the lean profile

Five tuning cases for the styles surface (DDIM, the ISO-25 set-current
paraphrase, the one-call drafting-standard paraphrase, the isocp text
style, and the dimstyle counting question) — measured against the live
catalog every one ranks top-1, so no alias vocabulary changed. The
docstring count moves to seventy-one (56 tuning + 15 holdout); the
holdout set is untouched.

Lean decision (spec §8.2): dimstyle_set_current, textstyle_set_current
and drawing_apply_standard join LEAN_TOOL_NAMES (50 -> 53); the seven
authoring/list tools stay full-only and all ten stay in core (no pack
claims them). Pinned by the new profile test in tests/test_styles.py,
written async like the rest of that module (its module-wide asyncio
mark warns on a sync test).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

tests/data/discovery_golden.py

@@ -1,6 +1,6 @@
 """Golden query set for tool discovery: English in, one right tool out.
 
-Sixty-six cases (51 tuning + 15 holdout) split into a **tuning** set and a
+Seventy-one cases (56 tuning + 15 holdout) split into a **tuning** set and a
 **holdout** set. The split is
 the point of the file. Ranking work is measured against
 :data:`TUNING_CASES` only; :data:`HOLDOUT_CASES` were written at the same time,
@@ -143,6 +143,18 @@ TUNING_CASES: tuple[GoldenCase, ...] = (
         "counting",
         risk="read",
     ),
+    # Styles (track E). DIMSTYLE / STYLE / MLEADERSTYLE are umbrella commands
+    # shared by their list/create/modify/set-current tools, so the one command
+    # case uses the command unique to a single tool and the rest are phrased.
+    GoldenCase("DDIM", "dimstyle_create", "command"),
+    GoldenCase("make ISO-25 the current dimension style", "dimstyle_set_current", "paraphrase"),
+    GoldenCase(
+        "set the drawing up to the ISO drafting standard in one go",
+        "drawing_apply_standard",
+        "paraphrase",
+    ),
+    GoldenCase("create a text style that uses the isocp font", "textstyle_create", "paraphrase"),
+    GoldenCase("which dimension styles are defined", "dimstyle_list", "counting", risk="read"),
 )