<feature>[ai]: add eval task sort columns for ZQL

Resolves: ZSTAC-72079

Change-Id: Ifa08d55dedbc6ff7beaf96c96142b470d1993dbf

Author: Shangmin Dou

conf/db/upgrade/V5.5.12__schema.sql

@@ -1,3 +1,32 @@
 -- ZSTAC-75319: Add normalizedModelName column for GPU spec dedup
 CALL ADD_COLUMN('GpuDeviceSpecVO', 'normalizedModelName', 'VARCHAR(255)', 1, NULL);
 CALL CREATE_INDEX('GpuDeviceSpecVO', 'idx_gpu_spec_normalized_model', 'normalizedModelName');
+
+-- Add totalScore and endTime columns to ModelEvaluationTaskVO for ZQL sorting support
+-- Previously these values were only stored inside the opaque JSON TEXT field,
+-- making them invisible to ZQL ORDER BY queries.
+CALL ADD_COLUMN('ModelEvaluationTaskVO', 'totalScore', 'DOUBLE', 1, NULL);
+CALL ADD_COLUMN('ModelEvaluationTaskVO', 'endTime', 'TIMESTAMP', 1, NULL);
+
+-- Add indexes to support efficient sorting
+CALL CREATE_INDEX('ModelEvaluationTaskVO', 'idx_ModelEvaluationTaskVO_totalScore', 'totalScore');
+CALL CREATE_INDEX('ModelEvaluationTaskVO', 'idx_ModelEvaluationTaskVO_endTime', 'endTime');
+
+-- Backfill totalScore from opaque JSON for existing completed tasks
+UPDATE `zstack`.`ModelEvaluationTaskVO`
+SET `totalScore` = JSON_EXTRACT(`opaque`, '$.details.total_score')
+WHERE `opaque` IS NOT NULL
+  AND `totalScore` IS NULL
+  AND JSON_EXTRACT(`opaque`, '$.details.total_score') IS NOT NULL;
+
+-- Backfill endTime from opaque JSON for existing completed/failed tasks
+-- end_time format from Python agent: "MMM dd, yyyy hh:mm:ss a" (e.g. "Jan 01, 2025 10:30:00 AM")
+UPDATE `zstack`.`ModelEvaluationTaskVO`
+SET `endTime` = STR_TO_DATE(
+    JSON_UNQUOTE(JSON_EXTRACT(`opaque`, '$.details.end_time')),
+    '%b %d, %Y %h:%i:%s %p'
+)
+WHERE `opaque` IS NOT NULL
+  AND `endTime` IS NULL
+  AND JSON_EXTRACT(`opaque`, '$.details.end_time') IS NOT NULL
+  AND JSON_UNQUOTE(JSON_EXTRACT(`opaque`, '$.details.end_time')) != '';