Add RelationshipChangeLog model and enhance character loading logic

backend/models/falukant/log/relationship_change_log.js

@@ -0,0 +1,49 @@
+import { Model, DataTypes } from 'sequelize';
+import { sequelize } from '../../../utils/sequelize.js';
+
+/**
+ * Log aller Änderungen an relationship und marriage_proposals.
+ * Einträge werden ausschließlich durch DB-Trigger geschrieben und nicht gelöscht.
+ * Hilft zu analysieren, warum z.B. Werbungen um einen Partner verschwinden.
+ */
+class RelationshipChangeLog extends Model {}
+
+RelationshipChangeLog.init(
+  {
+    changedAt: {
+      type: DataTypes.DATE,
+      allowNull: false,
+      defaultValue: DataTypes.NOW
+    },
+    tableName: {
+      type: DataTypes.STRING(64),
+      allowNull: false
+    },
+    operation: {
+      type: DataTypes.STRING(16),
+      allowNull: false
+    },
+    recordId: {
+      type: DataTypes.INTEGER,
+      allowNull: true
+    },
+    payloadOld: {
+      type: DataTypes.JSONB,
+      allowNull: true
+    },
+    payloadNew: {
+      type: DataTypes.JSONB,
+      allowNull: true
+    }
+  },
+  {
+    sequelize,
+    modelName: 'RelationshipChangeLog',
+    tableName: 'relationship_change_log',
+    schema: 'falukant_log',
+    timestamps: false,
+    underscored: true
+  }
+);
+
+export default RelationshipChangeLog;

backend/models/index.js

@@ -113,6 +113,7 @@ import Vote from './falukant/data/vote.js';
 import ElectionResult from './falukant/data/election_result.js';
 import PoliticalOfficeHistory from './falukant/log/political_office_history.js';
 import ElectionHistory from './falukant/log/election_history.js';
+import RelationshipChangeLog from './falukant/log/relationship_change_log.js';
 
 // — Kirchliche Ämter (Church) —
 import ChurchOfficeType from './falukant/type/church_office_type.js';
@@ -248,6 +249,7 @@ const models = {
   ElectionResult,
   PoliticalOfficeHistory,
   ElectionHistory,
+  RelationshipChangeLog,
   ChurchOfficeType,
   ChurchOfficeRequirement,
   ChurchOffice,