feat(member-notes): enhance member note functionality with structured data and observation tracking

backend/models/MemberNote.js

@@ -22,6 +22,40 @@ const MemberNote = sequelize.define('MemberNote', {
             return decryptData(encryptedValue);
         }
     },
+    kind: {
+        type: DataTypes.ENUM('general', 'strength', 'development', 'training_focus'),
+        allowNull: false,
+        defaultValue: 'general',
+    },
+    trainingFocus: {
+        type: DataTypes.TEXT,
+        allowNull: true,
+        field: 'training_focus',
+        set(value) {
+            this.setDataValue('trainingFocus', value ? encryptData(value) : null);
+        },
+        get() {
+            const encryptedValue = this.getDataValue('trainingFocus');
+            return encryptedValue ? decryptData(encryptedValue) : null;
+        }
+    },
+    sourceType: {
+        type: DataTypes.STRING,
+        allowNull: true,
+        field: 'source_type',
+    },
+    sourceLabel: {
+        type: DataTypes.TEXT,
+        allowNull: true,
+        field: 'source_label',
+        set(value) {
+            this.setDataValue('sourceLabel', value ? encryptData(value) : null);
+        },
+        get() {
+            const encryptedValue = this.getDataValue('sourceLabel');
+            return encryptedValue ? decryptData(encryptedValue) : null;
+        }
+    },
     memberId: {
         type: DataTypes.INTEGER,
         allowNull: false,