feat(session): ✨ Introduce conversation session metadata and state tracking for enhanced session management

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

@applications/api/src/modules/session/entities/conversation-session.entity.ts

@@ -16,4 +16,10 @@ export class ConversationSessionEntity extends BaseEntity {
 
   @Column({ name: 'expires_at', type: 'timestamptz' })
   expiresAt!: Date;
+
+  @Column({ nullable: true, type: 'varchar', length: 255, default: null })
+  title!: string | null;
+
+  @Column({ name: 'title_is_manual', type: 'boolean', default: false })
+  titleIsManual!: boolean;
 }