fix(content): final-review polish — link the-seven roster + roadmap wording

- faction.the-seven now relates down to all seven lords (spec §4 intent;
  bidirectional discoverability), regenerated the-seven.json.
- canon-roadmap: clarify Bloodsworn resolves the warlock's former [CANON-TBD] name.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HuHRPE7VfppUJEaoGBEUqZ

content/lore/cosmology.md

@@ -55,7 +55,11 @@ id: faction.the-seven
 type: faction
 status: canon
 secrecy: 0
-related: [person.the-warden, rule.blood-price, rule.possession]
+related: [person.the-warden, rule.blood-price, rule.possession,
+  person.kareth-the-red-king, person.vael-the-quiet-knife,
+  person.morren-the-grey-mother, person.ghaul-the-yoke,
+  person.ishri-the-open-mouth, person.nuun-the-hollow-choir,
+  person.draeth-the-crowned-worm]
 body: >
   Seven kings and the armies that answer to them — the Warden's enemy, and the
   world's. They do not want to rule the races so much as end them, dead or yoked,