refactor(core): rename system context to instructions (#35583)

packages/core/src/database/migration/20260705180000_rename_instructions.ts

@@ -0,0 +1,17 @@
+import { Effect } from "effect"
+import type { DatabaseMigration } from "../migration"
+
+export default {
+  id: "20260705180000_rename_instructions",
+  up(tx) {
+    return Effect.gen(function* () {
+      yield* tx.run(`ALTER TABLE \`session_context_entry\` RENAME TO \`instruction_entry\``)
+      yield* tx.run(`ALTER TABLE \`session_context_epoch\` RENAME TO \`instruction_checkpoint\``)
+      yield* tx.run(`
+        UPDATE \`event\`
+        SET \`type\` = 'session.instructions.updated.1'
+        WHERE \`type\` = 'session.context.updated.1'
+      `)
+    })
+  },
+} satisfies DatabaseMigration.Migration