[Jammy2211]

Summary

hpc-campaign phase 1 (#206). Adds a site layer: a site.yaml describing one HPC site (partitions, node sizes, limits, energy constants), loaded with Config.push_site(name). It is the input later phases use to lint Slurm requests and estimate carbon.

• schema: partitions with gpu_only, cores_per_node, mem_per_node_mb, max_time, max_array_size, tdp_w_per_cpu, cpu_is_thread, gpu_model, gpu_tdp_w; site-wide pue (range), grid_region, ci_basis, energy_accounting. Any value may be plain, {value: ...} or a {low, high[, central]} range, and may carry unverified: true
• Site.cpu_partitions / Site.check_cpu_job keep CPU-only jobs off gpu_only partitions
• Config.push_site(name): a config-dir site/<name>.yaml overrides the shipped autonerves/site/<name>.yaml; the result is kept on Config.site
• shipped autonerves/site/ral.yaml: ral CPU partition and gpu (gpu_only: true, A100), encoding the 2026-09-30 rule that CPU jobs never go on RAL gpu; every unconfirmed constant marked unverified (PUE 1.14–1.45, 2.8–4.4 W/CPU, A100 250–400 W)
• Nerves imports nothing from autofit (tested)

Independent of the PyAutoFit phase 1 PR; can merge in any order.

API Changes

Additive. New autonerves.site_config module and Config.push_site(name) / Config.site. Ships site/ral.yaml as package data (pyproject.toml).
See full details below.

Test Plan

• test_autonerves/test_site_config.py (new): schema validation, ranges and unverified, push_site("ral") loads the shipped file with gpu marked gpu_only, config-dir override, CPU job rejected on a gpu_only partition, no autofit import
• Full test_autonerves suite: 280 passed
• Smoke (with the PyAutoFit phase 1 branch): pyauto-heart smoke autofit autolens_test on the phase 1 worktree (PyAutoFit + PyAutoNerves + autofit_workspace branches together): 47 passed, 0 failed

Full API Changes (for automation & release notes)

Added

• autonerves.site_config — site schema, validation, Site, Site.cpu_partitions, Site.check_cpu_job
• Config.push_site(name), Config.site
• package data autonerves/site/ral.yaml

Migration

• None.

Refs #206

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