feat(agent-assignment): 에이전트 크리에이터 소속 관리 기능을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/partner/agent/assignment/AgentCreatorRelation.kt

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+package kr.co.vividnext.sodalive.partner.agent.assignment
+
+import kr.co.vividnext.sodalive.common.BaseEntity
+import kr.co.vividnext.sodalive.member.Member
+import java.time.LocalDateTime
+import javax.persistence.Column
+import javax.persistence.Entity
+import javax.persistence.FetchType
+import javax.persistence.JoinColumn
+import javax.persistence.ManyToOne
+
+@Entity
+class AgentCreatorRelation : BaseEntity() {
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "agent_id", nullable = false)
+    var agent: Member? = null
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "creator_id", nullable = false)
+    var creator: Member? = null
+
+    @Column(nullable = false)
+    var assignedAt: LocalDateTime? = null
+
+    @Column(nullable = true)
+    var unassignedAt: LocalDateTime? = null
+}

src/main/kotlin/kr/co/vividnext/sodalive/partner/agent/assignment/AgentCreatorRelationRepository.kt

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+package kr.co.vividnext.sodalive.partner.agent.assignment
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface AgentCreatorRelationRepository : JpaRepository<AgentCreatorRelation, Long> {
+    fun findAllByCreatorIdOrderByAssignedAtAsc(creatorId: Long): List<AgentCreatorRelation>
+
+    fun findFirstByCreatorIdAndUnassignedAtIsNull(creatorId: Long): AgentCreatorRelation?
+}

src/main/kotlin/kr/co/vividnext/sodalive/partner/agent/assignment/AssignAgentCreatorRequest.kt

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+package kr.co.vividnext.sodalive.partner.agent.assignment
+
+import java.time.LocalDateTime
+
+data class AssignAgentCreatorRequest(
+    val agentId: Long,
+    val creatorId: Long,
+    val assignedAt: LocalDateTime
+)

src/main/kotlin/kr/co/vividnext/sodalive/partner/agent/assignment/RemoveAgentCreatorRequest.kt

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+package kr.co.vividnext.sodalive.partner.agent.assignment
+
+import java.time.LocalDateTime
+
+data class RemoveAgentCreatorRequest(
+    val creatorId: Long,
+    val unassignedAt: LocalDateTime
+)