SEBSP-201 added migration to add index

Author: anhefti

src/main/resources/config/sql/base/V8__indexForTimestamp_v1_1.sql

@@ -0,0 +1,5 @@
+-- -----------------------------------------------------
+--     SEBSP-201 Add column index for timestamp in table screenshot_data
+-- -----------------------------------------------------
+
+CREATE INDEX `idx_screenshot_data_timestamp` ON `screenshot_data` (`timestamp` ASC);