Optimize ClinicalAttributeMapper sample ID queries for ClickHouse JDBC performance (#11703)

Apply ArrayTypeHandler optimization strategy to whereSample include, following
the same approach used in PatientMapper (commit 2e2ec22). This significantly
improves performance with ClickHouse JDBC connections by reducing parameter overhead.

Changes:
- Replace foreach loops in whereSample with ArrayTypeHandler for both single-study
  and multi-study queries
- Use SqlUtils.combineStudyAndPatientIds() for multi-study scenarios with
  CONCAT-based unique key matching
- Optimize getClinicalAttributeCountsBySampleIds query performance through
  updated whereSample include

This reduces prepared statement parameters from potentially thousands to single
array parameters, maintaining security through proper parameter binding.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <[email protected]>

Author: alisman

src/main/resources/org/cbioportal/legacy/persistence/mybatis/ClinicalAttributeMapper.xml

@@ -37,12 +37,15 @@
             <if test="sampleIds != null">
                 <if test="@java.util.Arrays@stream(studyIds.toArray()).distinct().count() == 1">
                     cancer_study.cancer_study_identifier = #{studyIds[0]} AND
-                    sample.stable_id IN
-                        <foreach item="item" collection="sampleIds" open="(" separator="," close=")">#{item}</foreach>
+                    sample.stable_id IN (
+                        #{sampleIds, typeHandler=org.apache.ibatis.type.ArrayTypeHandler}
+                    )
                 </if>
                 <if test="@java.util.Arrays@stream(studyIds.toArray()).distinct().count() > 1">
-                    (cancer_study.cancer_study_identifier, sample.stable_id) IN
-                        <foreach index="i" collection="sampleIds" open="(" separator="," close=")">(#{studyIds[${i}]},#{sampleIds[${i}]})</foreach>
+                    <bind name="sampleUniqueKeys" value="@org.cbioportal.legacy.persistence.mybatis.util.SqlUtils@combineStudyAndPatientIds(studyIds, sampleIds)" />
+                    CONCAT(cancer_study.cancer_study_identifier, ':', sample.stable_id) IN (
+                        #{sampleUniqueKeys, typeHandler=org.apache.ibatis.type.ArrayTypeHandler}
+                    )
                 </if>
             </if>
         </where>