fix(v0.3.1): sated bot stops chasing food + perf-leak + fuzzy improvement dedup

Third day of "bot just walks back and forth burning tokens". Root
causes were mechanical, not the manifesto:

1. SATED BOT CHASING FOOD (the big one)
   Bot had food=17 (nearly full) but storyline first_food + manifesto
   L1 required 2+ food ITEMS in inventory, so it looped scout-food /
   acquire-food for hours instead of working. Now both treat a hunger
   bar >= 14 (SATED_FOOD) as satisfied even with empty food inventory —
   a full bot chops wood / makes tools and grabs food opportunistically,
   only hard-pursuing food when actually hungry (< 14).
   manifesto/needs.js foodDetect + goal/storyline.js first_food.completed.

2. perf_hooks MEMORY LEAK (overnight OOM suspect)
   "MaxPerformanceEntryBufferExceededWarning: 1,000,001 measure entries".
   mineflayer/pathfinder emit perf marks we never consume. Added a
   60s reaper in bot.js (performance.clearMeasures/clearMarks). unref'd.

3. IMPROVEMENT QUEUE SELF-DUPLICATING
   The LLM re-filed closed gaps with reworded titles (#5/#8/#9 were
   dupes of implemented #1/#2/#3). Exact-title dedup missed them.
   Replaced with token-set fuzzy match (isDuplicateTitle): jaccard>=0.75
   OR >=3 shared meaningful tokens with jaccard>=0.5. Also: a re-filed
   gap that's already implemented/rejected is NOT resurrected as a new
   open row. Cleared all 5 open requests (now genuinely implemented).

Also confirmed (no change needed):
- canDig=true is a DELIBERATE codebase-wide choice ("without it the bot
  gets permanently stuck", actions.js). The stale memory recommending
  canDig=false is updated. ViaBackwards dig works partially (dug:1
  moved:1.8 observed); false would trap the bot in every pit.
- scout-food already has blind/tunnel fallback + 12s step timeout
  (operator's earlier edits) so trapped-pathfinder degrades instead of
  hanging 30s.

Tests: 407 green (was 404). Updated needs/state/storyline tests for the
SATED_FOOD threshold; added fuzzy-dedup + tokenize/jaccard tests.

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

runtime/goal/storyline.js

@@ -232,16 +232,17 @@ export const STORYLINE = Object.freeze([
 		title: "Найти первую еду",
 		narration_ru: "Нужна еда — ищу корову, курицу или ягоды.",
 		completed(snap) {
-			return countAny(snap?.inventory, FOOD_ITEMS) >= 2;
+			// Done if we have a stock (≥2 food items) OR the hunger bar is
+			// comfortable (≥14). A sated bot should be chopping wood, not
+			// chasing a chicken it doesn't need — it'll grab food
+			// opportunistically when one wanders close.
+			if (countAny(snap?.inventory, FOOD_ITEMS) >= 2) return true;
+			if ((snap?.food ?? 20) >= 14) return true;
+			return false;
 		},
 		suggestSkill(snap) {
-			// Two-tier strategy:
-			//  - If a passive food mob is visible nearby (≤24 blocks in
-			//    snapshot), kill it locally with acquire-food.
-			//  - Otherwise scout-food does long-range biome-aware search.
-			//    It commits to a cardinal for ~200 blocks, rescans, and
-			//    on biome boundary detection heads toward food-capable
-			//    terrain.
+			// Only reached when the bot is actually hungry (food < 14) and
+			// has no stock. Local mob → acquire-food; else long-range scout.
 			if (hasLocalFoodMob(snap)) return { skillId: "survive.acquire-food" };
 			return { skillId: "survive.scout-food" };
 		},

runtime/goal/storyline.test.js

@@ -73,10 +73,14 @@ test("step first_tools: requires all three wood tools", () => {
 	assert.equal(s.completed(snap({ inventory: { stone_pickaxe: 1, stone_axe: 1, stone_sword: 1 } })), true);
 });
 
-test("step first_food: completed at ≥2 food items", () => {
+test("step first_food: completed at ≥2 food items, OR when sated (food≥14)", () => {
 	const s = getStep("first_food");
-	assert.equal(s.completed(snap()), false);
-	assert.equal(s.completed(snap({ inventory: { bread: 2 } })), true);
+	// hungry + no food → not done
+	assert.equal(s.completed(snap({ food: 8 })), false);
+	// hungry + 2 food items → done (have a stock)
+	assert.equal(s.completed(snap({ food: 8, inventory: { bread: 2 } })), true);
+	// sated (food≥14) + no food → done (don't chase food while full)
+	assert.equal(s.completed(snap({ food: 17 })), true);
 });
 
 test("step first_food: local hunt only for edible passive mobs within acquire range", () => {