Checkpoint web parity through Chromium input tasks

tools/web/server-job-resource-budget.mjs

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+export const SERVER_JOB_RESOURCE_BUDGET_SCHEMA = 1;
+export const SERVER_JOB_RESOURCE_LIMITS = Object.freeze({
+  cpuMs: 60_000,
+  memoryBytes: 512 * 1024 * 1024,
+  processCount: 1,
+  fileCount: 1_024,
+  wallMs: 300_000,
+  outputBytes: 512 * 1024 * 1024,
+});
+
+const fields = Object.keys(SERVER_JOB_RESOURCE_LIMITS);
+
+function integer(value, field, minimum = 0) {
+  if (!Number.isSafeInteger(value) || value < minimum || value > SERVER_JOB_RESOURCE_LIMITS[field]) throw new Error(`SERVER_JOB_BUDGET_EXCEEDED: ${field} is outside the enforced budget`);
+  return value;
+}
+
+export function parseServerJobResourceBudget(value) {
+  if (!value || value.schemaVersion !== SERVER_JOB_RESOURCE_BUDGET_SCHEMA || typeof value !== "object") throw new Error("SERVER_JOB_BUDGET_INVALID: schema is unsupported");
+  if (Object.keys(value).some((key) => key !== "schemaVersion" && !fields.includes(key))) throw new Error("SERVER_JOB_BUDGET_INVALID: undeclared budget field");
+  return Object.freeze({ schemaVersion: SERVER_JOB_RESOURCE_BUDGET_SCHEMA, ...Object.fromEntries(fields.map((field) => [field, integer(value[field], field)])) });
+}
+
+export function createServerJobResourceReceipt(budgetValue, usageValue, status = "SUCCEEDED") {
+  const budget = parseServerJobResourceBudget(budgetValue);
+  if (!usageValue || typeof usageValue !== "object") throw new Error("SERVER_JOB_BUDGET_INVALID: usage is invalid");
+  const usage = Object.freeze(Object.fromEntries(fields.map((field) => [field, integer(usageValue[field], field)])));
+  const exceeded = fields.filter((field) => usage[field] > budget[field]);
+  if (exceeded.length > 0) throw new Error(`SERVER_JOB_BUDGET_EXCEEDED: ${exceeded.join(",")}`);
+  if (!["SUCCEEDED", "FAILED", "CANCELLED"].includes(status)) throw new Error("SERVER_JOB_BUDGET_INVALID: status is unsupported");
+  return Object.freeze({ schemaVersion: SERVER_JOB_RESOURCE_BUDGET_SCHEMA, status, budget, usage, enforced: true, exceeded: [] });
+}