perf: speed up local test runs by moving coverage to optional script

Run vitest without coverage by default (pnpm test) and add pnpm test:coverage which enforces the coverage thresholds. CI keeps using the coverage run so thresholds are still enforced on every push.

src/lib/ci-workflow-contract.test.ts

@@ -25,7 +25,7 @@ describe("CI workflow", () => {
 	it("check runs lint, typecheck, and test", () => {
 		expect(workflow).toContain("pnpm biome:lint");
 		expect(workflow).toContain("pnpm typecheck");
-		expect(workflow).toContain("pnpm test");
+		expect(workflow).toContain("pnpm test:coverage");
 	});
 
 	it("check job runs on self-hosted runner", () => {

src/lib/deploy-workflow-contract.test.ts

@@ -4,7 +4,7 @@ import { expect, it } from "vitest";
 const workflow = readFileSync(".gitea/workflows/ci.yaml", "utf8");
 const deploy = readFileSync("scripts/ci-deploy.sh", "utf8");
 it("uses two test workers and runs smoke checks in the deployment transaction", () => {
-	expect(workflow).toContain("pnpm test --maxWorkers=2");
+	expect(workflow).toContain("pnpm test:coverage --maxWorkers=2");
 	expect(workflow).not.toContain("\n  e2e:");
 	expect(workflow).toContain("bash scripts/ci-deploy.sh");
 	expect(deploy).toContain(