NAD complex provenance serialization depends on Python hash seed #487

src/pathwaymech/ecocyc_complex.py constructs output provenance dictionaries by iterating the unordered PROVENANCE set (_class_proof, line 164; complex_metadata, line 212). Identical original XML therefore produces different serialized key order across Python hash seeds, including nested PC-1 provenance.

The retained THIO native attempt demonstrates the defect for existing NAD owners nad232-ecoli-cplx0-682 and nad232-ecoli-pyrnutranshydrogen-cplx. Baseline order is license,url,version,sha256; the native attempt begins sha256,url,version,license. Values are equal, but the actual ordered preservation helper raises Changed prior sources: nad232-ecoli-cplx0-682.

Three independent subprocesses with PYTHONHASHSEED=1, 2, and 3 reconstructed metadata from the complete original complex XML and PC-1 companion. Decoded values were equal; serialized ordering differed. This code belongs to NAD PR #480 and should be fixed before merge.

Use an explicit deterministic output-field sequence matching the retained baseline while keeping closed-set validation. Add a cross-process regression for both outer and nested provenance. Preserve the failed attempt; do not relax ordering or manually repair generated outputs. The future THIO carrier/state modules contain analogous set iterations and must be handled in their own runtime scope.

Independent reproducer: /private/tmp/pathwaymech-next-233-native-owner-diagnosis-20261012/order_probe.py; results: order-probe-result.json and complete per-seed outputs.

Stable key: nad-complex-provenance-key-order.