fix(6251): the rules warning sends its reader to the rule-arm review

surfaced_never_pulled told a rules reader there was no judged sample for the
rule arms. There is one now; the guard tying the text to REVIEWABLE caught it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/grimoire/mcp/tools/search.py

@@ -599,8 +599,11 @@ async def retrieval_telemetry(
       corpus. Not a verdict on them: a line carries its matched passage, so
       an unopened record may have been unrelated, enough as shown, or already
       in context. Judge a sample (`menus_to_review`) before acting on it.
-      For RULES there is no judged sample: a rule set aside again and again
-      is a trigger to fix (`update_rule(when_to_apply=...)`), not a floor.
+      For RULES, judge a sample of the rule arm that showed them
+      (`menus_to_review(source="prompt_rule")`, or `pre_tool_rule`,
+      `write_path_rule`); a rule set aside again and again where it does
+      not apply is a trigger to fix (`update_rule(when_to_apply=...)`), not
+      a floor.
     - `read_and_unacted` — distinct rules OPENED in the window that recorded
       no outcome, against the ones that did. The worse sibling of `surfaced_never_pulled` above: a
       rule nobody opens is cheap, while a rule read and silently unchanged is