docs(decisions): D-223 #951 implementation notes + Gemma naming methodology
- Add docs/gemma-naming-methodology.md preserving the corridor-aware LLM
place-naming approach (sector palettes, two-stage register selection +
generation, few-shot prompting, KV-cache refresh, dedup, Earth-major
blocklist, deterministic fallback) as institutional knowledge after the
pipeline's retirement.
- Add an implementation-status note to D-223 recording what #951 did
(generator + naming cluster retired, import_economics owns the atlas
index, population deferred to #955, Sol exempt, dup bug fixed).
- CHANGELOG entries.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>