Add unique constraints to laser tables (#313)

Author: gfrn

schemas/ispyb/updates/2026_03_02_LaserParameters_unique_contraints.sql

@@ -0,0 +1,6 @@
+INSERT IGNORE INTO SchemaStatus (scriptName, schemaStatus) VALUES ('2026_03_02_LaserParameters_unique_contraints.sql', 'ONGOING');
+
+ALTER TABLE LaserParameters ADD CONSTRAINT LaserParameters_robotActionId_uc1 UNIQUE (robotActionId); 
+ALTER TABLE LaserPoint ADD CONSTRAINT LaserPoint_laserParametersId_pointIndex_uc1 UNIQUE (laserParametersId, pointIndex); 
+
+UPDATE SchemaStatus SET schemaStatus = 'DONE' WHERE scriptName = '2026_03_02_LaserParameters_unique_contraints.sql';