FIX: Truncate seeded persona's names to fit name length constraint (#34393)

plugins/discourse-ai/db/migrate/20250721080444_seed_personas_from_triage_scripts.rb

@@ -35,6 +35,10 @@ class SeedPersonasFromTriageScripts < ActiveRecord::Migration[8.0]
                 "Unnamed triage automation script ID #{field["automation_id"]}"
               end
             )
+
+          # Persona's name field cannot be longer than 100 chars.
+          name = name.truncate(99)
+
           temp = field["temperature"]
 
           # Extract the model ID from the setting value (e.g., "custom:-5" -> "-5")