- SPECIFICATION.md: add 8 KC endpoints to Section 11.1, new Section 11.3
documenting .kc format, extraction pipeline, packing, lifecycle state
machine, and all response shapes. Update endpoint count 78 → 86.
- ROADMAP.md: mark .kc Format Spec as Complete in Tier 0 table
- STATUS.md: add KC features to core systems table, update migration
list through 018, update endpoint count
- MODULES.md: add metadata, dependencies, and macros endpoints to
core module listing
