v0.3.0-rc.3: event-driven awareness + skill pre-emption

Adds a reactive layer on top of the polling reflex. The bot now
notices environmental shocks (forced moves, HP plunges, hostile
spawns) within ~100ms instead of waiting for the next DISPATCH tick,
and the in-flight skill is preempted so the next reflex cycle can
re-plan against the current world state.

This is the rc that wires the "rc.1 plumbing + rc.2 manifesto" into
a feedback loop:
  - awareness fires preempt → dispatch aborts
  - reflex tick re-evaluates → manifesto walks the ladder
  - new dispatch picks the right skill for the new world state

Pieces:

- runtime/awareness/events.js (new) — bot.on listeners:
  - move: single-tick Δposition ≥ 5 blocks → forced_move flag + preempt
  - health: HP drop ≥ 2 → health_plunge flag + preempt
  - entitySpawn: hostile mob within 12 blocks → hostile_added + preempt
  - blockUpdate: nearby block change → env_changed flag (no preempt,
    throttled 800ms; otherwise gather skills would self-preempt
    every dig)

- runtime/skills/index.js — RUNNER_CODES.PREEMPTED + raceWithAbort()
  wraps every execute() against ctx.abortSignal. Existing skills get
  preemption for free; they don't have to check the signal manually.

- runtime/bot.js:
  - dispatchAction creates a fresh AbortController per dispatch and
    stores it on reflexCtx.currentAbort
  - attachAwareness fires controller.abort() when something disrupts
    the active skill; runSkill returns code: "preempted" and the
    reflex moves on
  - reflexCtx.lastPreempt records the most recent shock

Tests: 332 green (was 315 on rc.2, +17 new):
- runtime/awareness/events.test.js — 12 tests (each event type +
  thresholds + throttling + passive-mob filter)
- runtime/skills/contract.test.js — 3 abortSignal tests
  (mid-flight, pre-armed, clean signal)

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pepa-pi-bot",
-  "version": "0.3.0-rc.2",
+  "version": "0.3.0-rc.3",
   "private": true,
   "description": "An autonomous, self-extending Minecraft player powered by Pi and Mineflayer.",
   "license": "MIT",
@@ -16,7 +16,7 @@
     "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/skills/pillar-up.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/skill-registry.test.js runtime/modes.test.js runtime/pathfinder-watchdog.test.js runtime/manifesto/needs.test.js runtime/manifesto/state.test.js runtime/knowledge/knowledge.test.js runtime/llm/provider.test.js runtime/coach/postmortem.test.js runtime/coach/advice.test.js runtime/coach/reflect.test.js runtime/coach/fast-advisor.test.js runtime/persona/chatter.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/skills/pillar-up.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/skill-registry.test.js runtime/modes.test.js runtime/pathfinder-watchdog.test.js runtime/manifesto/needs.test.js runtime/manifesto/state.test.js runtime/awareness/events.test.js runtime/knowledge/knowledge.test.js runtime/llm/provider.test.js runtime/coach/postmortem.test.js runtime/coach/advice.test.js runtime/coach/reflect.test.js runtime/coach/fast-advisor.test.js runtime/persona/chatter.test.js scripts/edit-scope.test.js scripts/lint-patch.test.js"
   },
   "dependencies": {
     "better-sqlite3": "^11.10.0",