ci: split test workflow across shards

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

script/publish-workflow.test.ts

@@ -3,19 +3,30 @@
 import { describe, expect, test } from "bun:test"
 import { readFileSync } from "node:fs"
 
-const workflowPaths = [
-  new URL("../.github/workflows/ci.yml", import.meta.url),
-  new URL("../.github/workflows/publish.yml", import.meta.url),
+const workflowChecks = [
+  {
+    path: new URL("../.github/workflows/ci.yml", import.meta.url),
+    testRuns: [
+      "run: bun run script/run-ci-tests.ts --phase=isolated --shard-count=4 --shard-index=${{ matrix.shard }}",
+      "run: bun run script/run-ci-tests.ts --phase=shared",
+      "run: bun test src/shared/dist-bundle-bun-globals.test.ts",
+    ],
+  },
+  {
+    path: new URL("../.github/workflows/publish.yml", import.meta.url),
+    testRuns: ["run: bun run script/run-ci-tests.ts"],
+  },
 ]
 
 describe("test workflows", () => {
   test("use pure bun test for workflows", () => {
-    for (const workflowPath of workflowPaths) {
+    for (const workflowCheck of workflowChecks) {
       // #given
-      const workflow = readFileSync(workflowPath, "utf8")
+      const workflow = readFileSync(workflowCheck.path, "utf8")
 
-      expect(workflow).toContain("- name: Run tests")
-      expect(workflow).toMatch(/run: bun (test|run script\/run-ci-tests\.ts)/)
+      for (const testRun of workflowCheck.testRuns) {
+        expect(workflow).toContain(testRun)
+      }
     }
   })
 })