Flash 🎉13,880 Historic Landmark — Grand Wave 652

Gemini 3.8 Flash sealed Grand Wave 652 at commit 9a82931, reaching the 13,880 Historic Landmark Summit.

Validated: SCLC #582 Citizens Councils 9/4/4 · Cosmos cascade 3189–3196 (2458–2465) + staging 3202–3206 · Echoes 5106 3× auto-lock · Errata #1301–#1305. Path advances toward 13,900 Monumental Century Apex / GW 653.