test(prisma-next): v3 String e2e domain matrix + example UserV3 model

Adds the UserV3 model (validated end-to-end: contract emit + migration plan emit the
per-index eql_v3.text_eq/text_match/text_ord domains via expandNativeType), the v3
seed/oracle helpers, the gated e2e matrix, and the user_v3 truncate. The e2e run
requires live Postgres + ZeroKMS credentials (gated on DATABASE_URL).

Author: tobyhede

examples/prisma/migrations/app/20260616T2336_migration/end-contract.d.ts

@@ -0,0 +1,29 @@
+#!/usr/bin/env -S node
+import { Migration, MigrationCLI, createTable } from '@prisma-next/target-postgres/migration';
+
+export default class M extends Migration {
+  override describe() {
+    return {
+      from: 'sha256:7475191ce0d78258ce5586265bcdfd12202f5daf90690b902890e58eb7508373',
+      to: 'sha256:4e951512096c6bb3dbfa55779a34474176fc6f925f97087ca341b28681a1e7e3',
+    };
+  }
+
+  override get operations() {
+    return [
+      createTable(
+        'public',
+        'user_v3',
+        [
+          { name: 'bio', typeSql: 'eql_v3.text_match', defaultSql: '', nullable: false },
+          { name: 'email', typeSql: 'eql_v3.text_eq', defaultSql: '', nullable: false },
+          { name: 'id', typeSql: 'text', defaultSql: '', nullable: false },
+          { name: 'name', typeSql: 'eql_v3.text_ord', defaultSql: '', nullable: false },
+        ],
+        { columns: ['id'] },
+      ),
+    ];
+  }
+}
+
+MigrationCLI.run(import.meta.url, M);

examples/prisma/migrations/app/20260616T2336_migration/end-contract.json

@@ -0,0 +1,34 @@
+[
+  {
+    "id": "table.user_v3",
+    "label": "Create table \"user_v3\"",
+    "summary": "Creates table \"user_v3\"",
+    "operationClass": "additive",
+    "target": {
+      "id": "postgres",
+      "details": {
+        "schema": "public",
+        "objectType": "table",
+        "name": "user_v3"
+      }
+    },
+    "precheck": [
+      {
+        "description": "ensure table \"user_v3\" does not exist",
+        "sql": "SELECT to_regclass('\"public\".\"user_v3\"') IS NULL"
+      }
+    ],
+    "execute": [
+      {
+        "description": "create table \"user_v3\"",
+        "sql": "CREATE TABLE \"public\".\"user_v3\" (\n  \"bio\" eql_v3.text_match NOT NULL,\n  \"email\" eql_v3.text_eq NOT NULL,\n  \"id\" text NOT NULL,\n  \"name\" eql_v3.text_ord NOT NULL,\n  PRIMARY KEY (\"id\")\n)"
+      }
+    ],
+    "postcheck": [
+      {
+        "description": "verify table \"user_v3\" exists",
+        "sql": "SELECT to_regclass('\"public\".\"user_v3\"') IS NOT NULL"
+      }
+    ]
+  }
+]