feat(understand): cable_takeoff - one row per load, rounded to the metre

cable_rows reads each load's power, phases, voltage, neutral and VFD from the
P&ID's electrical texts near its tag, and its panel from the layout's wiring
callouts (else the P&ID's), names normalised CP 1 -> CP-1. The length is the
Manhattan distance on the layout from the tag to its panel, and the cable
ROUNDUP(length x (1 + allowance)) to the metre, on the length rounded to
1e-6 m so binary noise never buys a metre. Power is never invented: a load
with no stated kW keeps an empty cell and an open item. Without a layout the
lengths stay empty with an open item per row. Room and panel totals count a
panel package's power once, never its children's as well; the rule is on the
method sheet. Sections only from the caller's section_rules - no standard
table exists here.

The workbook gains the cable shape (Metraj, Ozet by room and panel, Kontrol
as the open-items list, Metodoloji) in the same three languages;
cable_takeoff joins SECTION 27. Inventory regenerated; README snapshot 243
tools (238 advertised); registry snapshot 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

@@ -2487,6 +2487,23 @@ TOOL_ALIASES: dict[str, ToolAliases] = {
             "ведомость трубопроводов",
         ),
     ),
+    "cable_takeoff": ToolAliases(
+        acad=(),
+        synonyms=(
+            "cable takeoff",
+            "cable schedule",
+            "cable lengths",
+            "cable list",
+            "how much cable",
+            "motor cable lengths",
+            "kablo metrajı",
+            "kablo metraji",
+            "kablo listesi",
+            "kablo cetveli",
+            "кабельный журнал",
+            "ведомость кабелей",
+        ),
+    ),
 }