feat(understand): drawing_scale_check - is this drawing to scale against that one

Equipment tags found exactly once in each drawing are matched (a tag
found twice - a plan copy, a legend - is reported ambiguous and takes no
part; two plan copies resolve to the cluster that matches the most
tags). For every pair of matched tags at least min_pair_mm apart on the
reference, the ratio of their distances is taken in millimetres by each
drawing's inferred unit; the median, the quartiles, the share within
+/-10 % of the median, the same per room of the reference, and the
verdict: to_scale (>= 80 %, with its factor), schematic (<= 50 %),
partly, or insufficient under three matched tags.

server.py grows SECTION 26 to two tools with drawing_scale_check (core,
read-only, tagged analysis/query); alias record, inventory, README
release snapshot 243, frozen group sizes (analysis 14).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

discovery/aliases.py

@@ -2494,6 +2494,25 @@ TOOL_ALIASES: dict[str, ToolAliases] = {
             "yabanci cizim",
         ),
     ),
+    "drawing_scale_check": ToolAliases(
+        acad=(),
+        synonyms=(
+            "scale check",
+            "is the p&id to scale",
+            "is this drawing to scale",
+            "schematic or to scale",
+            "unscaled p&id",
+            "tag distances against the layout",
+            "can i measure pipe on the p&id",
+            "ölçek",
+            "olcek",
+            "ölçek kontrolü",
+            "olcek kontrolu",
+            "ölçekli mi",
+            "olcekli mi",
+            "масштаб",
+        ),
+    ),
 }