feat(runtime/knowledge): SQLite knowledge base with starter intel + lessons

Per-server state/<host>/knowledge.db. Schema:
- recipes (seeded from docs/minecraft-recipes.json, 38 rows)
- mob_intel (15 mobs incl. creeper/zombie/skeleton with verdict_no_weapon)
- block_intel (30 blocks with required_tool / drops)
- lessons (12 starter rules — "don't attack creepers with fists", etc.)
- deaths / postmortems / poi / wiki_pages / chat_log / code_changes

Public API in runtime/knowledge/index.js: initKnowledge, recall, record,
markApplied, topAdvice, lookupRecipe/Mob/Block, insertDeath, insertPostmortem,
recordPOI, poiNearby, logChat. All operations gracefully no-op when
better-sqlite3 is unavailable.

10 tests; covers init, seeding, recall filters, lesson lifecycle, death/PM
round-trip, spatial POI queries, chat log.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -16,9 +16,10 @@
     "tui": "tsx tui/tui.tsx",
     "propose:apply": "node scripts/propose-apply.js",
     "stop": "bash scripts/stop.sh",
-    "test": "node --test runtime/skills/contract.test.js runtime/skills/groups.test.js runtime/skills/compat.test.js runtime/skills/recovery-tunnel-out.test.js runtime/curriculum.test.js runtime/social/social.test.js runtime/social/conversation.test.js runtime/social/chat-history.test.js runtime/social/reply-pi.test.js runtime/stuck-incident.test.js runtime/compat.test.js runtime/reflex.test.js runtime/base-site.test.js runtime/locations.test.js runtime/watch-filter.test.js runtime/world-journal.test.js runtime/scenario-memory.test.js runtime/critic.test.js runtime/skill-library.test.js runtime/modes.test.js runtime/pathfinder-watchdog.test.js scripts/edit-scope.test.js scripts/lint-patch.test.js"
+    "test": "node --test runtime/skills/contract.test.js runtime/skills/groups.test.js runtime/skills/compat.test.js runtime/skills/recovery-tunnel-out.test.js runtime/curriculum.test.js runtime/social/social.test.js runtime/social/conversation.test.js runtime/social/chat-history.test.js runtime/social/reply-pi.test.js runtime/stuck-incident.test.js runtime/compat.test.js runtime/reflex.test.js runtime/base-site.test.js runtime/locations.test.js runtime/watch-filter.test.js runtime/world-journal.test.js runtime/scenario-memory.test.js runtime/critic.test.js runtime/skill-library.test.js runtime/modes.test.js runtime/pathfinder-watchdog.test.js runtime/knowledge/knowledge.test.js runtime/coach/postmortem.test.js runtime/persona/chatter.test.js scripts/edit-scope.test.js scripts/lint-patch.test.js"
   },
   "dependencies": {
+    "better-sqlite3": "^11.10.0",
     "canvas": "^3.2.3",
     "dotenv": "^16.4.5",
     "ink": "^7.0.4",
@@ -31,7 +32,6 @@
     "mineflayer-pathfinder": "^2.4.5",
     "mineflayer-pvp": "^1.3.2",
     "mineflayer-tool": "^1.2.0",
-    "better-sqlite3": "^11.3.0",
     "prismarine-item": "^1.18.0",
     "prismarine-viewer": "^1.33.0",
     "react": "^19.2.6",