feat(v0.3.1): real survival patterns — biome-aware scout, wedge-relocate, escape-pit-safe

Operator reported the bot wandered the same 50×50 patch for 2 hours
without making any progress toward food. Diagnosis showed three root
causes; this commit addresses all five open improvement_requests
the LLM (postmortem + tuner) flagged automatically.

Research basis (`Voyager`, `Plan4MC`, `GITM`, `Mindcraft`):
  - Coverage / commit-to-cardinal exploration when local scan fails
  - Biome-aware strategy switching using a static affordance table
  - Wedge detector above the skill layer that triggers RELOCATE not
    RETRY (per-skill stuck checks reset on re-entry — useless)
  - Time-in-region bbox heuristic + need-duration AND skill-cycle gate

Concrete changes:

1. `runtime/goal/storyline.js`
   - orient_self.completed: added timeout fallback (HP=full + session
     >120s → done) so barren biomes don't block the bot on step 1.
     Closes improvement #2 'Нет навыка оценки когда сменить район'.
   - first_food.suggestSkill: now picks survive.scout-food (new) when
     no passive mob is nearby; falls back to survive.acquire-food only
     when something is in immediate range.

2. `runtime/biome-affordances.js` (new)
   - Static table: 40+ biomes → {has_passive_mobs, has_trees,
     has_water, has_crops, livable}.
   - Unknown biomes return optimistic defaults to avoid regressions.
   - Closes improvement #1 'Нет навыка целевого поиска еды по биому'.

3. `runtime/skills/scout-food.js` (new — survive.scout-food)
   - Tiered strategy: biome check → scan 32 → scan 64 → commit a
     cardinal for 200 blocks rescanning every 16. On cardinal
     exhaustion, returns code:"exhausted" so the curriculum can
     escalate to village.relocate.
   - In barren biomes (desert/ocean/snowy_plains) the scan is
     SKIPPED — bot walks straight toward the nearest neighbour
     biome that affords passive mobs (8-direction biome probe at
     radius 64).

4. `runtime/awareness/wedge-detector.js` (new)
   - Rolling 10-min position bbox tracker. observe() called every
     tick; isWedged() returns true when bbox<50 AND active need
     unmet >5min AND skill cycles ≥3.
   - markRelocationStarted() suppresses further wedge firings
     until the bot has displaced ≥200b — prevents stack overflow
     of relocate calls.
   - Lives ABOVE the skill layer (in runtime/reflex.js), because
     any per-skill stuck check resets on re-entry.

5. `runtime/skills/relocate.js` (new — village.relocate)
   - 300-block walk in least-recently-used cardinal (per-incident
     memory in ctx.recentRelocations).
   - Re-paths every 32 blocks, soft-tolerates pathfinder failures
     (3 consecutive throws → exit with code:"stuck_in_place").
   - Closes improvement #2 + #4 ('low success rate trigger').

6. `runtime/skills/escape-pit-safe.js` (new — recovery.escape-pit-safe)
   - Surveys 4 cardinals AND ceiling height before committing.
     Picks the direction with most open blocks (≥3, no lava).
     Falls through to pillar-up only if ceiling clear ≥4b. Returns
     code:"no_strategy" if both blocked so curriculum can escalate
     to relocate.
   - Closes improvement #3 'Нет навыка для безопасного выхода'.

7. `runtime/reflex.js`
   - Wedge detector wired before manifesto/storyline. If wedge.wedged
     is true, dispatches village.relocate directly and returns —
     bypasses every other branch.
   - ctx.disableWedge flag for tests.

8. `runtime/coach/advisor-trigger.js`
   - LLM provider outage backoff: 3 consecutive http_400 / timeout /
     network_error → suppress advisor for 10 min. Today's TimeWeb
     gpt-5.4-mini was 400'ing for an hour straight; we were spending
     trigger budget on dead calls. Closes improvement implicit gap
     in #5.

9. `runtime/bot.js`
   - Tracks botSpawnedAt; snapshot._sessionMs exposed for storyline
     orient_self timeout fallback.

Tests: 396 green (was 378, +18):
  - runtime/biome-affordances.test.js — 8 tests
  - runtime/awareness/wedge-detector.test.js — 9 tests
  - runtime/goal/storyline.test.js — 1 new test (orient_self timeout)

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

runtime/coach/advisor-trigger.js

@@ -34,13 +34,27 @@ const PREEMPT_WINDOW_MS = 30_000;
 const EMERGENCY_HP = 6;
 const EMERGENCY_HOSTILE_DIST = 8;
 const EMERGENCY_COOLDOWN_MS = 20_000;
+// LLM outage backoff — if 3 consecutive advise() calls return
+// http_400 / network_error, suppress further calls for 10 minutes.
+const PROVIDER_OUTAGE_FAILS = 3;
+const PROVIDER_OUTAGE_BACKOFF_MS = 10 * 60 * 1000;
 
 let _lastTriggerAt = 0;
 let _inFlight = false;
+let _consecutiveFails = 0;
+let _providerOutageUntil = 0;
 
 export function _resetForTest() {
 	_lastTriggerAt = 0;
 	_inFlight = false;
+	_consecutiveFails = 0;
+	_providerOutageUntil = 0;
+}
+
+function isProviderError(code) {
+	return code === "network_error"
+		|| code === "timeout"
+		|| (typeof code === "string" && code.startsWith("http_"));
 }
 
 export function getTriggerState() {
@@ -63,6 +77,9 @@ export function tickAdvisor(ctx, { plannedSkillId } = {}) {
 	if (_inFlight) return { fired: false, reason: "in_flight" };
 
 	const now = Date.now();
+	if (_providerOutageUntil > now) {
+		return { fired: false, reason: "provider_outage", retryAt: _providerOutageUntil };
+	}
 
 	// Drop a recommendation that's already aged out.
 	if (ctx.advisorRecommendation && now - ctx.advisorRecommendation.at > RECOMMENDATION_TTL_MS) {
@@ -142,6 +159,15 @@ export function tickAdvisor(ctx, { plannedSkillId } = {}) {
 				info("advisor-trigger", `recommendation: ${result.action} (${result.latencyMs}ms)`);
 			} else if (!result.ok) {
 				warn("advisor-trigger", `advise failed: ${result.code} (${result.detail})`);
+				if (isProviderError(result.code)) {
+					_consecutiveFails += 1;
+					if (_consecutiveFails >= PROVIDER_OUTAGE_FAILS) {
+						_providerOutageUntil = Date.now() + PROVIDER_OUTAGE_BACKOFF_MS;
+						warn("advisor-trigger", `LLM provider outage (${_consecutiveFails} fails in a row); backing off ${Math.round(PROVIDER_OUTAGE_BACKOFF_MS / 60000)}min`);
+					}
+				}
+			} else {
+				_consecutiveFails = 0;
 			}
 		})
 		.catch((e) => {