content: in-document prose search via asText (763/763)

content/search-text + search-text-ids find every block whose (asText b)
contains a term — spanning all text-bearing fields by reusing the canonical
asText projection, so it can't drift from stats/find-replace. Section
wrappers excluded. +7 query tests.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lib/content/scoreboard.json

@@ -14,7 +14,7 @@
     "tree-edit": {"pass": 17, "fail": 0},
     "move": {"pass": 11, "fail": 0},
     "clone": {"pass": 10, "fail": 0},
-    "query": {"pass": 13, "fail": 0},
+    "query": {"pass": 20, "fail": 0},
     "toc": {"pass": 8, "fail": 0},
     "anchor": {"pass": 6, "fail": 0},
     "outline": {"pass": 14, "fail": 0},
@@ -42,7 +42,7 @@
     "md-doc": {"pass": 12, "fail": 0},
     "fed": {"pass": 20, "fail": 0}
   },
-  "total_pass": 756,
+  "total_pass": 763,
   "total_fail": 0,
-  "total": 756
+  "total": 763
 }