docs(adr): mark CategoryRow pending Q23 and qualify answer 5's fit (improvise-cq1q.1)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze

context/adr/007-stable-identities.md

@@ -447,7 +447,8 @@ things in earlier text meet them, and none is resolved here:
   declaration's display and not a reference. Whether the normal case should still
   spell an id there is part of Q23.
 - **Answers 5 and 19** picture the measure case as a display plus one id
-  (`Profit(3)`, `Profit (profit)`), which fits an id/display split.
+  (`Profit(3)`, `Profit (profit)`), which fits an id/display split (answer 5's
+  file-line picture fits option (c) only loosely; see Q23).
 - **Answer 30** and the ADR's worked example (`Tax` in `CustomCat`) are about the
   *rare* case. The decision stands. The emphasis of the surrounding text changed:
   revision 9 wrote the dimension target as the main case and the `_Measure` target as
@@ -891,7 +892,8 @@ pipe-quotes any display name that would otherwise read as display plus id:
   `ClearCell { view, … }`, which improvise-wpxr (PR #281, merged) gave a view named by
   its name, like every other view-scoped variant (improvise-lltt).
 - **Projections carry id and display together:**
-  - `CategoryRow { id, display, items: Vec<(ItemHandle, String)>, axis }`;
+  - `CategoryRow { id, display, items: Vec<(ItemHandle, String)>, axis }`
+    (**pending Q23**: under option (c) there is no `ItemHandle`);
   - `FormulaCache` rows `{ id, stored, display }`. `display` is what the panel shows
     (answer 19): the target's display name with its id in parentheses, then the
     expression over display names, with an id wherever a display name is ambiguous
@@ -1261,9 +1263,11 @@ dimension case, so the two cases put different kinds of thing in one position.
   written somewhere: today only non-formula `_Measure` items persist, and formula
   targets are rebuilt from `## Formulas`.
 
-Answers 5 and 19 picture the measure case as `Profit(3)` and `Profit (profit)`. Both
-pictures fit (a), (b) and (c): each gives the measure a display and an id, and under
-(c) the `profit` in answer 19's picture is the item id.
+Answers 5 and 19 picture the measure case as `Profit(3)` and `Profit (profit)`.
+Answer 19's panel picture fits (a), (b) and (c): each gives the measure a display and
+an id, and under (c) the `profit` is the item id. Answer 5's file-line picture,
+`- Profit(3) = …`, fits (a) and (b) exactly, and (c) only loosely, because (c) writes
+the item id in the target position where answer 5 shows the display.
 
 **No recommendation is made until the user chooses.** Revision 9 recommended (a),
 written when the dimension case was the one in view. Any ranking of how well an option