content(italy-2025): rename to Tuscany Gravel 2025, fix dates + stories template

Trip title Cycling Tuscany 2025 -> Tuscany Gravel 2025, dates Oct->Sep,
and stories container uses the stories template (was default).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mpdu3Dt1iVoozHwAMyjrbn

pages/01.trips/italy-2025/04.stories/stories.md

@@ -1,7 +1,5 @@
 ---
 title: Stories
-template: default
+template: stories
-routable: false
-visible: false
 published: true
 ---

pages/01.trips/italy-2025/trip.md

@@ -1,9 +1,8 @@
 ---
-title: 'Cycling Tuscany 2025'
+title: 'Tuscany Gravel 2025'
 template: trip
-date: '2025-10-11'
+date: '2025-09-01'
-date_start: '2025-10-11'
+date_start: '2025-09-01'
-date_end: '2025-10-16'
+date_end: '2025-09-08'
 cover_image: ''
 ---
-