Reconcile Phi's completed corpus and closed grammar boundary

[dcellison]

Summary

• Marks the present authored original-corpus milestone complete, with one sustained dialogue and three reviewed philosophical essays.
• Replaces the routine particle and construction checklists with a defect-led amendment boundary for Phi's closed grammar.
• Removes completed website and vocabulary work from the deferred ledger, which now contains only genuinely open or parked items.
• Records D118, closes NTP-04, and makes the short-work certification queue the next package.

Record changes

The roadmap now separates completed authored work from spontaneous conversation evidence. COR-03 is complete, while COR-04 and COR-05 retain their narrower dialogue and outside-evidence requirements. Incidental live lexicon totals have been removed where the count itself was not part of the finding; historical audit and migration counts remain where they carry evidence.

The development protocol now treats the grammar, particle system, and other non-content inventories as closed. A proposal must document a repeatable language-level defect, show why current Phi cannot resolve it, and receive an explicit maintainer decision before canon is reopened. The exceptional checklist then requires complete documentation, migration, and validation.

The deferred ledger no longer doubles as a completion archive. Shelf styling, entrance-page styling, and the finished legacy vocabulary prose audit remain recorded in the roadmap and development history instead.

No grammar rule, particle, vocabulary entry, example, or corpus text changes in this pull request.

Checks

• python3 scripts/validate_examples.py
• python3 scripts/validate_sentences.py
• python3 scripts/test_sentence_validator.py
• python3 scripts/test_vocabulary_schema.py
• python3 scripts/content_vocabulary_decisions.py --check
• python3 scripts/test_content_vocabulary_decisions.py
• python3 scripts/test_name_forms.py
• python3 scripts/test_translation_layers.py
• python3 scripts/translation_process_status.py --check
• python3 scripts/test_translation_process_status.py
• python3 scripts/source_reconstruction.py
• python3 scripts/test_source_reconstruction.py
• python3 scripts/audit_phonetic_neighbors.py --output /tmp/phonetic_neighbors_baseline.txt
• diff -u documents/validation/phonetic_neighbors_baseline.txt /tmp/phonetic_neighbors_baseline.txt
• python3 scripts/generate_reference.py
• python3 scripts/build_site.py
• git diff --cached --check