Fix bun-types resolution; fix possibly-undefined health-check row

Same bun-types-vs-@types/bun fix as continuum-common. Also fixes a real
noUncheckedIndexedAccess violation in the /health route: db.execute()'s
result is T[], so rows[0] is 'T | undefined', not T — destructuring assumed
it always existed. Verified with a clean 'bunx tsc --noEmit'.

src/index.ts

@@ -14,9 +14,9 @@ const app = new Elysia()
   .use(cors())
   .use(swagger({ path: "/docs" }))
   .get("/health", async () => {
-    const [{ ok }] = await db.execute<{ ok: number }>(sql`select 1 as ok`);
+    const rows = await db.execute<{ ok: number }>(sql`select 1 as ok`);
     const redisPing = await redis.ping();
-    return { status: "ok", db: ok === 1, redis: redisPing === "PONG" };
+    return { status: "ok", db: rows[0]?.ok === 1, redis: redisPing === "PONG" };
   })
   .use(authRoutes)
   .use(farmRoutes)