fix: minimize deploy cutover downtime

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

@@ -75,10 +75,15 @@ describe("production deploy workflow", () => {
 		expect(
 			toContainLiteral(deployJob, `mv "${stageVar}/node_modules" node_modules`),
 		).toBe(true);
+		expect(deployJob).toContain("mv node_modules node_modules.prev");
 		expect(deployJob).toContain("Rolling back .next to previous artifact");
+		expect(deployJob).toContain(
+			"Rolling back node_modules to previous artifact",
+		);
 		const buildAt = deployJob.indexOf("pnpm build");
 		const stopAt = deployJob.indexOf("pm2 stop next");
 		const migrateAt = deployJob.indexOf("pnpm db:migrate");
+		const resetAt = deployJob.indexOf("git reset --hard origin/main");
 		const startLabelAt = deployJob.indexOf("Starting PM2");
 		const startAt = deployJob.indexOf(
 			"pm2 start pnpm --name next -- start",
@@ -86,9 +91,12 @@ describe("production deploy workflow", () => {
 		);
 		expect(buildAt).toBeGreaterThan(-1);
 		expect(migrateAt).toBeGreaterThan(buildAt);
-		expect(stopAt).toBeGreaterThan(migrateAt);
+		expect(resetAt).toBeGreaterThan(migrateAt);
+		expect(stopAt).toBeGreaterThan(resetAt);
 		expect(startLabelAt).toBeGreaterThan(stopAt);
 		expect(startAt).toBeGreaterThan(startLabelAt);
+		expect(deployJob.match(/pm2 stop next/g)).toHaveLength(1);
+		expect(deployJob.slice(stopAt, startAt)).not.toContain("sleep ");
 	});
 
 	it("does not restart the healthy app when deployment fails before cutover", () => {