Add upgrade script

Author: Jake Morgan

upgrades/2.4.1-to-2.4.2/01_widen_installation_history_sql_server_version.sql

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+/*
+Copyright 2026 Darling Data, LLC
+https://www.erikdarling.com/
+
+Upgrade from 2.4.1 to 2.4.2
+Widen config.installation_history.sql_server_version from nvarchar(255) to nvarchar(512).
+Idempotent: safe to run multiple times.
+*/
+
+SET ANSI_NULLS ON;
+SET ANSI_PADDING ON;
+SET ANSI_WARNINGS ON;
+SET ARITHABORT ON;
+SET CONCAT_NULL_YIELDS_NULL ON;
+SET QUOTED_IDENTIFIER ON;
+SET NUMERIC_ROUNDABORT OFF;
+SET IMPLICIT_TRANSACTIONS OFF;
+SET STATISTICS TIME, IO OFF;
+GO
+
+USE PerformanceMonitor;
+GO
+
+IF OBJECT_ID(N'config.installation_history', N'U') IS NOT NULL
+BEGIN
+    IF EXISTS
+    (
+        SELECT
+            1
+        FROM INFORMATION_SCHEMA.COLUMNS
+        WHERE TABLE_SCHEMA = N'config'
+        AND   TABLE_NAME = N'installation_history'
+        AND   COLUMN_NAME = N'sql_server_version'
+        AND   DATA_TYPE = N'nvarchar'
+        AND   CHARACTER_MAXIMUM_LENGTH BETWEEN 1 AND 511
+    )
+    BEGIN
+        ALTER TABLE
+            config.installation_history
+        ALTER COLUMN
+            sql_server_version nvarchar(512) NOT NULL;
+
+        PRINT 'Widened config.installation_history.sql_server_version to nvarchar(512).';
+    END
+    ELSE
+    BEGIN
+        PRINT 'config.installation_history.sql_server_version already nvarchar(512) or wider; skipping.';
+    END;
+END
+ELSE
+BEGIN
+    PRINT 'Table config.installation_history does not exist; skipping.';
+END;
+GO

upgrades/2.4.1-to-2.4.2/upgrade.txt

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+01_widen_installation_history_sql_server_version.sql