fix(codegen-ts): migrate test sources from InMemorySource to InMemoryStringSource

The Python-loader-unification merge that landed on main (a3e6f65) renamed
the metadata package's `InMemorySource` to `InMemoryStringSource` with a
new constructor signature requiring an explicit { id, format } metadata
argument.

This branch's two new test files (prompt-render-file.test.ts and
prompt-render-conformance.test.ts) were authored against the old API on a
parallel timeline; the integration merge surfaced the breakage. Forward
fix updates both to the new constructor shape:

  new InMemoryStringSource(json, { id: "...", format: "json" })

All 2548 tests now pass on the merged main; build is clean across all 14
packages.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: dmealing

server/typescript/packages/codegen-ts/test/generators/prompt-render-file.test.ts

@@ -1,11 +1,14 @@
 import { describe, test, expect } from "bun:test";
-import { MetaDataLoader, InMemorySource } from "@metaobjectsdev/metadata";
+import { MetaDataLoader, InMemoryStringSource } from "@metaobjectsdev/metadata";
 import { promptRender } from "../../src/generators/prompt-render-file.js";
 import type { GenContext } from "../../src/generator.js";
 
 async function loadRoot(children: unknown[]) {
   const res = await new MetaDataLoader().load([
-    new InMemorySource(JSON.stringify({ "metadata.root": { package: "acme::ai", children } })),
+    new InMemoryStringSource(
+      JSON.stringify({ "metadata.root": { package: "acme::ai", children } }),
+      { id: "meta.json", format: "json" },
+    ),
   ]);
   expect(res.errors).toEqual([]);
   return res.root;

server/typescript/packages/codegen-ts/test/golden/prompt-render-conformance.test.ts

@@ -12,7 +12,7 @@
 import { describe, it, expect } from "bun:test";
 import { existsSync, readFileSync, readdirSync } from "node:fs";
 import { join, resolve } from "node:path";
-import { MetaDataLoader, InMemorySource } from "@metaobjectsdev/metadata";
+import { MetaDataLoader, InMemoryStringSource } from "@metaobjectsdev/metadata";
 import { promptRender } from "../../src/generators/prompt-render-file.js";
 import type { GenContext } from "../../src/generator.js";
 
@@ -51,7 +51,10 @@ describe("promptRender() conformance — expected/prompts.ts byte-match", () =>
       // Load all .json files from the input directory
       const inputFiles = readdirSync(inputDir).filter((f) => f.endsWith(".json"));
       const sources = inputFiles.map((f) =>
-        new InMemorySource(readFileSync(join(inputDir, f), "utf-8")),
+        new InMemoryStringSource(
+          readFileSync(join(inputDir, f), "utf-8"),
+          { id: f, format: "json" },
+        ),
       );
 
       const res = await new MetaDataLoader().load(sources);