fix(cli): thread dialect into --from-db diff so CHECK evolution applies

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: dmealing

server/typescript/packages/cli/src/commands/migrate.ts

@@ -214,6 +214,7 @@ export async function migrateCommand(
       diffResult = await diff({
         expected,
         actual,
+        dialect: kysely.dialect,
         allow: tokensToAllowOptions(config.allow),
         onAmbiguous: async (a) => {
           collectedAmbiguous.push(a);