fix(ops): supervise the job worker and stop the health probe from lying

Four production defects, all found by auditing the running host rather than
the code. Each one had a signature that looked like a network or permissions
problem and was actually a configuration or ordering bug.

jobs-worker never ran

`import "./load-env"` sat on line 3 of scripts/jobs-worker.ts, but ESM
evaluates a module's imports in source order and the first import reaches
`@/env`, which validates process.env at import time. The ZodError on
DATABASE_URL therefore fired before load-env ever executed, so the worker
could only start from a shell that had already exported the configuration.
Nothing supervised it either, so scheduled articles, catalog export, JAR and
database backups, disk alerts and the ops health probe have all been dead;
`cms:jobs-worker:heartbeat` did not exist. Moved the import to the top and
added deployment/systemd/cms-jobs-worker.service with Restart=always.

The JAR backup additionally pointed at './emulator/Arcturus.jar', which does
not exist and would go stale on the next emulator upgrade. resolveEmulatorJar
now accepts a file, a directory or a wildcard and picks the newest JAR, the
same way emulator.service picks its build, and reports an unresolvable path
once instead of logging an opaque copyFile ENOENT every night.

/api/health answered 200 with the database down

The route documented this as intentional, and ci-deploy.sh worked around it
by grepping the body for '"database":true'. The container healthcheck did not,
so Docker reported containers healthy while every page 500'd. The status is
now load-bearing: 503 when the database is unreachable, 200 otherwise. Redis
and the emulator deliberately do not fail the container — both have in-process
fallbacks, so failing them would trade a slow site for an outage.

The runtime had no V8 heap cap

NODE_OPTIONS existed only in the builder stage. With no cap, V8 sized its
heap from host memory (23.5 GB) while the container was limited to 4 GB, so
the kernel OOM-killed the process mid-request — the same failure mode as the
14 host-wide `next-build` kills. docker-start.mjs now reads the cgroup limit
(v2 with a v1 fallback) and sets 70% of it, respecting an explicit override.

Storage ownership was only repaired for one path

ci-deploy.sh chowned storage/imaging and nothing else, so
storage/catalog-git/hotel-status.json kept coming back root:root and
/api/admin/catalog/status kept throwing EACCES. All eight writable storage
paths are repaired now. The silent-failure mode is the reason this mattered:
these writes sit inside try/catch, so a wrong owner looks like a slow page
rather than an error.

nginx: robots.txt was a guaranteed 404, and TLS never resumed

`index index.html` without a `root` left every try_files resolving against
/etc/nginx/html, which sits behind a 0750 directory — the worker got EACCES
on each stat and nginx logs a failed stat at crit, which is where 149 crit
lines per scan came from. robots.txt answered from that same broken location,
so crawlers were pointed at a file they could never read while sitemap.xml
kept advertising it. Added `root`, proxied robots.txt to the CMS, added
ssl_session_cache (there was no session resumption at all), and set
Restart=on-failure in a systemd override, since the packaged unit ships
Restart=no and nginx is the only thing serving the site.

Verified against the running host: 3379 tests, typecheck and biome clean,
nginx -t passes, health returns 200 with every check green, and the worker has
run for hours at NRestarts=0 with a heartbeat refreshing each minute.

scripts/jobs-worker.ts

@@ -1,9 +1,17 @@
-import { drainOperationEffects } from "../src/features/operations/worker";
-import { drainFurnitureImports } from "../src/lib/services/furni-job-worker";
+// Must stay the first import. ESM evaluates a module's imports in source
+// order, and `../src/features/operations/worker` reaches `@/env`, which parses
+// process.env at import time. With this import further down the tree, load-env
+// ran *after* the schema validation had already thrown on a missing
+// DATABASE_URL, so the worker could only ever start from an environment that
+// already exported the config — which is why `pnpm jobs:worker` died
+// immediately and nothing supervised it.
 import "./load-env";
+import * as nodeFs from "node:fs";
+import * as nodePath from "node:path";
 import { Cron } from "croner";
 import { lt, sql } from "drizzle-orm";
 import { env } from "../src/env";
+import { drainOperationEffects } from "../src/features/operations/worker";
 import { db, PasswordReset, WebsiteLoginLogs } from "../src/lib/db";
 import { logger } from "../src/lib/logger";
 import { redis } from "../src/lib/redis";
@@ -18,6 +26,7 @@ import {
 	diskLevel,
 	parseDfOutput,
 } from "../src/lib/services/disk-usage";
+import { drainFurnitureImports } from "../src/lib/services/furni-job-worker";
 import { publishDueArticles } from "../src/lib/services/news-scheduler";
 import { scheduledAutoCleanFakeNitros } from "../src/lib/services/nitro-cleanup";
 import { rcon } from "../src/lib/services/rcon";
@@ -161,13 +170,69 @@ async function checkDiskUsage(): Promise<void> {
 	}
 }
 
+/**
+ * Resolve the JAR to back up. `EMULATOR_JAR_PATH` may point at the file itself
+ * or at a directory of release JARs, because the emulator's own unit file
+ * launches `ls -t Polaris-*-jar-with-dependencies.jar` — a path pinned to one
+ * release filename goes stale on the next emulator upgrade, and a stale path
+ * fails as a bare ENOENT from copyFile that gives no hint what is wrong. A
+ * directory (or a path with a `*`) resolves to the most recently modified JAR,
+ * matching how the emulator actually picks its build.
+ */
+export function resolveEmulatorJar(
+	configuredPath: string,
+	fs: typeof import("node:fs") = nodeFs,
+	{ resolve }: typeof import("node:path") = nodePath,
+): string | null {
+	const { existsSync, readdirSync, statSync } = fs;
+	if (configuredPath.includes("*")) {
+		const dir = configuredPath.slice(0, configuredPath.lastIndexOf("/") + 1);
+		const pattern = configuredPath.slice(dir.length);
+		if (!existsSync(dir)) return null;
+		return (
+			readdirSync(dir)
+				.filter((name: string) => name.startsWith(pattern.split("*")[0] ?? ""))
+				.map((name: string) => resolve(dir, name))
+				.filter((path: string) => existsSync(path))
+				.sort(
+					(a: string, b: string) => statSync(b).mtimeMs - statSync(a).mtimeMs,
+				)[0] ?? null
+		);
+	}
+	if (existsSync(configuredPath) && statSync(configuredPath).isFile())
+		return configuredPath;
+	// A directory: take the newest JAR in it.
+	if (existsSync(configuredPath) && statSync(configuredPath).isDirectory()) {
+		return (
+			readdirSync(configuredPath)
+				.filter((name: string) => name.endsWith(".jar"))
+				.map((name: string) => resolve(configuredPath, name))
+				.sort(
+					(a: string, b: string) => statSync(b).mtimeMs - statSync(a).mtimeMs,
+				)[0] ?? null
+		);
+	}
+	return null;
+}
+
 async function backupEmulatorJar(): Promise<void> {
 	if (!env.EMULATOR_JAR_PATH || !env.EMULATOR_BACKUP_DIR) return;
 
-	const { copyFileSync, mkdirSync, readdirSync, unlinkSync, existsSync } =
-		await import("node:fs");
+	const fs = await import("node:fs");
+	const { copyFileSync, mkdirSync, readdirSync, unlinkSync, existsSync } = fs;
 	const { resolve } = await import("node:path");
 
+	const jarPath = resolveEmulatorJar(env.EMULATOR_JAR_PATH, fs, nodePath);
+	if (!jarPath) {
+		// Configured but unusable: say so once, loudly, instead of every night
+		// logging an opaque copyFile ENOENT that reads like a permissions bug.
+		logger.error(
+			"Emulator JAR backup skipped: EMULATOR_JAR_PATH does not resolve to a JAR",
+			{ module: "jobs", configured: env.EMULATOR_JAR_PATH },
+		);
+		return;
+	}
+
 	const timestamp = new Date().toISOString().slice(0, 19).replace(/[T:]/g, "-");
 	const backupFile = resolve(
 		env.EMULATOR_BACKUP_DIR,
@@ -179,10 +244,11 @@ async function backupEmulatorJar(): Promise<void> {
 	}
 
 	try {
-		copyFileSync(env.EMULATOR_JAR_PATH, backupFile);
+		copyFileSync(jarPath, backupFile);
 		logger.info("Backed up emulator JAR", {
 			module: "jobs",
 			backupFile,
+			source: jarPath,
 		});
 
 		const keep = env.EMULATOR_BACKUP_KEEP ?? 7;