feat: run lightning at cpu-8 (8 vCPU / 16 GiB) in dax benchmark

[rusenask]

What

Sizes the lightning provider to 8 vCPU / 16 GiB (cpu-8) in the dax benchmark, matching the standardized resource profile introduced in #196.

Why

Lightning was already in the dax matrix but had no resource sizing, so it ran on the SDK default cpu-1 (1 vCPU) while every other provider used 8 vCPU / 16 GiB — making its results incomparable (the same issue #196 fixed for the rest of the matrix).

How

Lightning can't be sized through DAX_RESOURCE_OPTIONS like most providers. The @computesdk/lightning wrapper applies instanceType from the provider factory config and overrides any instanceType passed to sandbox.create():

const params = { ...providerOptions, instanceType: config.instanceType ?? DEFAULT_INSTANCE_TYPE };

So sizing has to happen at createCompute time. This PR:

• Reads LIGHTNING_INSTANCE_TYPE in createCompute (default cpu-1, the SDK default), mirroring how northflank reads its deployment plan from env with a fallback.
• Sets LIGHTNING_INSTANCE_TYPE: cpu-8 in the dax workflow env, scoping the 8 vCPU sizing to the dax benchmark and leaving other modes (e.g. TTI) on the default.
• Documents the mechanism in dax.ts (next to the existing E2B note) and env.example.

Verification

Ran the dax benchmark against lightning.ai with cpu-8:

lightning: 7/7 phases | total 41.93s | prepare 4.37s | clone 2.41s | install 12.91s | typecheck 16.04s (1/1 OK)

The sandbox reports 8 logical CPUs, confirming cpu-8 took effect, and all 7 dax phases complete.

🤖 Generated with Claude Code

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Contributor License Agreement

All contributors are covered by a CLA.

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Sandbox Dax Benchmark Results

Provider	Phases	Total	Prepare	Clone	Install	Typecheck	Status
archil	0/7	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
beam	--	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
blaxel	6/7	45.69s	2.09s	2.29s	10.79s	0.00s	0/1 OK
cloud-run	2/7	0.97s	0.19s	0.00s	0.00s	0.00s	0/1 OK
cloudflare	0/7	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
codesandbox	0/7	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
createos	7/7	48.61s	3.00s	2.52s	11.90s	25.84s	1/1 OK
daytona	7/7	68.22s	2.89s	1.91s	14.43s	36.24s	1/1 OK
declaw	7/7	154.82s	15.73s	9.87s	31.83s	77.92s	1/1 OK
e2b	7/7	71.84s	8.79s	2.99s	10.26s	41.02s	1/1 OK
hopx	--	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
isorun	--	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
lightning	6/7	10.80s	4.97s	2.91s	1.03s	0.00s	0/1 OK
modal	7/7	96.18s	4.26s	2.48s	15.32s	65.95s	1/1 OK
namespace	7/7	38.77s	4.54s	0.96s	7.59s	19.95s	1/1 OK
northflank	--	0.00s	0.00s	0.00s	0.00s	0.00s	0/1 OK
opencomputer	6/7	24.49s	3.47s	1.70s	16.45s	0.00s	0/1 OK
runloop	2/7	84.29s	0.00s	0.00s	17.50s	35.92s	1/1 OK
superserve	7/7	100.98s	6.30s	4.55s	21.56s	64.31s	1/1 OK
tenki	6/7	26.30s	8.82s	4.31s	9.62s	0.00s	0/1 OK
tensorlake	7/7	76.15s	12.76s	1.51s	11.96s	43.95s	1/1 OK
upstash	7/7	51.59s	3.83s	1.57s	10.56s	25.62s	1/1 OK
vercel	7/7	93.97s	23.22s	2.46s	14.07s	46.03s	1/1 OK

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Sandbox Benchmark Results

Sequential

#	Provider	Score	Median TTI	P95	P99	Status
1	isorun	99.7	0.01s	0.07s	0.07s	10/10
2	createos	99.3	0.05s	0.10s	0.10s	10/10
3	declaw	99.3	0.05s	0.11s	0.11s	10/10
4	northflank	98.8	0.08s	0.17s	0.17s	10/10
5	archil	98.1	0.13s	0.28s	0.28s	10/10
6	lightning	98.0	0.17s	0.24s	0.24s	10/10
7	blaxel	97.7	0.21s	0.25s	0.25s	10/10
8	upstash	96.3	0.30s	0.47s	0.47s	10/10
9	superserve	96.3	0.29s	0.49s	0.49s	10/10
10	modal	94.7	0.46s	0.64s	0.64s	10/10
11	cloud-run	94.1	0.51s	0.71s	0.71s	10/10
12	tensorlake	92.8	0.65s	0.83s	0.83s	10/10
13	vercel	92.6	0.34s	1.33s	1.33s	10/10
14	e2b	91.5	0.76s	0.97s	0.97s	10/10
15	runloop	91.1	0.48s	1.51s	1.51s	10/10
16	tenki	88.0	1.03s	1.45s	1.45s	10/10
17	daytona	84.2	1.13s	2.25s	2.25s	10/10
18	cloudflare	77.6	1.87s	2.80s	2.80s	10/10
19	codesandbox	72.7	2.52s	3.06s	3.06s	10/10
20	opencomputer	47.8	2.03s	17.85s	17.85s	10/10
21	beam	0.0	0.00s	0.00s	0.00s	0/10
22	hopx	0.0	0.00s	0.00s	0.00s	0/10

Staggered

#	Provider	Score	Median TTI	P95	P99	Status
1	isorun	99.8	0.01s	0.02s	0.02s	10/10
2	createos	99.5	0.05s	0.06s	0.06s	10/10
3	northflank	99.2	0.07s	0.09s	0.09s	10/10
4	declaw	99.1	0.06s	0.13s	0.13s	10/10
5	lightning	98.2	0.17s	0.20s	0.20s	10/10
6	archil	97.9	0.12s	0.34s	0.34s	10/10
7	blaxel	97.7	0.22s	0.25s	0.25s	10/10
8	superserve	97.0	0.28s	0.32s	0.32s	10/10
9	runloop	94.8	0.49s	0.58s	0.58s	10/10
10	modal	94.6	0.48s	0.65s	0.65s	10/10
11	cloud-run	94.2	0.54s	0.63s	0.63s	10/10
12	tensorlake	93.5	0.62s	0.68s	0.68s	10/10
13	e2b	93.0	0.64s	0.81s	0.81s	10/10
14	tenki	90.0	0.98s	1.04s	1.04s	10/10
15	vercel	84.1	0.34s	3.47s	3.47s	10/10
16	upstash	80.8	0.36s	4.26s	4.26s	10/10
17	cloudflare	78.9	1.82s	2.54s	2.54s	10/10
18	codesandbox	74.2	2.44s	2.80s	2.80s	10/10
19	daytona	57.1	1.25s	8.85s	8.85s	10/10
20	opencomputer	34.1	4.31s	35.27s	35.27s	10/10
21	beam	0.0	0.00s	0.00s	0.00s	0/10
22	hopx	0.0	0.00s	0.00s	0.00s	0/10

Burst

#	Provider	Score	Median TTI	P95	P99	Status
1	isorun	99.8	0.02s	0.02s	0.02s	10/10
2	createos	99.2	0.08s	0.09s	0.09s	10/10
3	northflank	98.9	0.11s	0.11s	0.11s	10/10
4	declaw	98.5	0.07s	0.26s	0.26s	10/10
5	lightning	98.4	0.16s	0.17s	0.17s	10/10
6	archil	98.3	0.16s	0.20s	0.20s	10/10
7	blaxel	97.6	0.23s	0.26s	0.26s	10/10
8	superserve	96.2	0.35s	0.42s	0.42s	10/10
9	upstash	94.7	0.44s	0.68s	0.68s	10/10
10	vercel	94.7	0.39s	0.75s	0.75s	10/10
11	runloop	94.6	0.50s	0.60s	0.60s	10/10
12	cloud-run	94.3	0.51s	0.67s	0.67s	10/10
13	modal	93.8	0.58s	0.68s	0.68s	10/10
14	tensorlake	93.0	0.69s	0.71s	0.71s	10/10
15	e2b	91.6	0.76s	0.96s	0.96s	10/10
16	tenki	89.4	1.04s	1.08s	1.08s	10/10
17	codesandbox	69.8	2.80s	3.35s	3.35s	10/10
18	daytona	54.6	0.91s	25.39s	25.39s	10/10
19	cloudflare	52.9	3.46s	5.12s	5.12s	9/10
20	opencomputer	34.3	4.28s	35.77s	35.77s	10/10
21	beam	9.7	0.32s	0.32s	0.32s	1/10
22	hopx	0.0	0.00s	0.00s	0.00s	0/10

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