feat: tighter topology columns for larger symbols and text

Reduce the column width from 190 to 174 px while keeping icon and font
sizes. Width-limited diagrams are about 8-9 % narrower, so symbols and
labels appear correspondingly larger on the landscape page.

Bump version to 0.6.2.

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

netbox_customer_export/__init__.py

@@ -5,7 +5,7 @@ class CustomerExportConfig(PluginConfig):
     name = "netbox_customer_export"
     verbose_name = "Kunden-Export"
     description = "Kundendokumentation als PDF oder Word exportieren"
-    version = "0.6.1"
+    version = "0.6.2"
     author = "Claude"
     base_url = "customer-export"
     min_version = "4.6.8"

netbox_customer_export/topology.py

@@ -146,7 +146,7 @@ def build_graphs(scope, opts):
 
 # --- Layout -------------------------------------------------------------------
 
-CELL_W = 190  # Spaltenbreite
+CELL_W = 174  # Spaltenbreite (enger = Symbole und Schrift im Dokument größer)
 ICON = 64  # Symbolgröße
 LANE = 11  # Abstand der Sammelschienen im Zwischenraum
 PORT_H = 13  # Zeilenhöhe der Port-Beschriftungen