fix: 변수명 누락 수정

Author: KSH0326

src/main/java/com/back/domain/study/plan/entity/RepeatRuleEmbeddable.java

@@ -21,7 +21,7 @@ public class RepeatRuleEmbeddable {
     @Enumerated(EnumType.STRING)
     private Frequency frequency;
 
-    private Integer intervalValue;
+    private Integer repeatInterval;
     private List<DayOfWeek> byDay = new ArrayList<>();
     private LocalDate untilDate; // LocalDateTime → LocalDate 변경
 }

src/main/java/com/back/domain/study/plan/entity/StudyPlanException.java

@@ -61,7 +61,7 @@ public enum ExceptionType {
     @Column(name = "modified_repeat_rule")
     @AttributeOverrides({
             @AttributeOverride(name = "frequency", column = @Column(name = "modified_frequency")),
-            @AttributeOverride(name = "intervalValue", column = @Column(name = "modified_repeat_interval")),
+            @AttributeOverride(name = "repeatInterval", column = @Column(name = "modified_interval_value")),
             @AttributeOverride(name = "byDay", column = @Column(name = "modified_by_day")),
             @AttributeOverride(name = "untilDate", column = @Column(name = "modified_until_date"))
     })