[Jammy2211]

Summary

Raise PyAutoArray's minimum supported Python version to 3.12 and advertise only Python 3.12 and 3.13.

Remove Python-version markers that became tautological while preserving the supported nufftax range, and delete the now-unreachable pre-3.12 nufftax error path and test.

Refs #418.

API Changes

Python API symbols and signatures are unchanged. Installation now requires Python 3.12 or newer, and the missing-nufftax error path is simplified for supported runtimes.
See full details below.

Test Plan

• Python 3.12: 929 passed
• Python 3.13 official profile: 928 passed, 1 skipped
• Wheel metadata: Requires-Python >=3.12; classifiers 3.12/3.13 only; nufftax >=0.4,<0.5 preserved without Python markers
• Curated ecosystem smoke: 50 passed, 12 parallel timeouts, 3 intentional skips; sequential retry passed 11/12, with the known 300-second subhalo_recovery.py timeout explicitly accepted by the human as non-causal
• Independent Claude Opus 5 review: CLEAN
• Heart: YELLOW score 65, exact previously acknowledged campaign reason set, no RED

Validation checklist (--auto run — plan was not pre-approved)

• Effective level: safe (header: supervised, cap: feature medium → safe)
• Plan: on issue feat: require Python 3.12 #418, written at start, unmodified since
• Gate: tests 3.12 929 passed + 3.13 928 passed/1 skipped · smoke accepted non-causal single timeout after 11/12 sequential retries passed · review CLEAN · Heart YELLOW within launch acknowledgement
• Human: plan sound in hindsight?
• Human: diff matches plan (no scope creep)?
• Human: merge authorized contingent on exact reviewed head and green CI

Full API Changes (for automation & release notes)

Changed Behaviour

• Package installation now requires Python 3.12 or newer.
• autoarray.operators.transformer.nufftax_exception() always emits the supported-runtime installation guidance; its special Python 3.9–3.11 message is removed.

Migration

• Recreate environments on Python 3.12 or newer before installing the next PyAutoArray release.

Generated by the PyAutoLabs agent workflow.