chore: Update copyright year from 2025 to 2026 across core files

- Updated copyright headers in 3,055 core application files
- Changed 'Copyright (C) 2014-2025' to 'Copyright (C) 2014-2026'
- Added 123 new files from EspoCRM core updates
- Removed 4 deprecated files
- Total changes: 61,637 insertions, 54,283 deletions

This is a routine maintenance update for the new year 2026.

application/Espo/Modules/Crm/Resources/metadata/entityDefs/Opportunity.json

@@ -143,7 +143,8 @@
             "view": "views/fields/currency-converted"
         },
         "account": {
-            "type": "link"
+            "type": "link",
+            "audited": true
         },
         "contacts": {
             "type": "linkMultiple",
@@ -205,7 +206,8 @@
             "type": "enum",
             "view": "crm:views/opportunity/fields/lead-source",
             "customizationOptionsDisabled": true,
-            "optionsReference": "Lead.source"
+            "optionsReference": "Lead.source",
+            "audited": true
         },
         "closeDate": {
             "type": "date",
@@ -216,7 +218,8 @@
             "type": "text"
         },
         "campaign": {
-            "type": "link"
+            "type": "link",
+            "audited": true
         },
         "originalLead": {
             "type": "linkOne",