fix(perception): use numeric block ids — callback matchers silently fail under ViaBackwards

Root cause of "bot just stands still": every gather.* skill was using
bot.findBlock({ matching: (b) => names.includes(b.name) }), and under
mineflayer 1.21.4 + ViaBackwards the Block objects fed into the
callback have a wrong .name field (Block.type / numeric id is still
correct — this is mineflayer issue #2347). Every search returned null,
every skill reported "no_target", reflex looped wander → tunnel-out
forever. The bot's logs said "dispatch ok" while the operator watched
it pace in circles.

Proven live with a new diag.match skill on play.xmatic.team:
  findBlocks({matching: numericIds})              → 50 hits
  findBlocks({matching: (b) => b.name === ...})   →  0 hits  ← the bug
  findBlock({matching: (b) => b.name === ...})    → null     ← the bug
  findBlock({matching: numericIds})               → dark_oak_log @ (606,62,110)

After this fix the same bot from the same spawn dispatches gather.logs
and reaches the chop loop ("chop: dark_oak_log at 606,62,110 (tool=fists)")
instead of returning "no reachable log within 64 blocks".

Changes:
- runtime/perception.js (new): findBlocksByName / findNearestBlockByName
  centralise the numeric-id workaround for any future skill.
- runtime/actions.js: chopNearestTree, sleepInBed, placeCraftingTable now
  use perception. Also load mineflayer-tool plugin alongside collectblock
  (collectblock 1.6 hard-requires bot.tool to dispatch a dig).
- gather-stone, gather-wool, deposit-surplus rewritten to numeric-id
  search. gather-wool also loads mineflayer-tool.
- diagnose-scan.js (new): two diagnostic skills — diag.scan reports
  findBlocks counts per radius for common blocks; diag.match cross-tests
  the four matcher styles so this regression can be re-proven on demand.
- runtime/skills/index.js: registers diag.scan + diag.match.

Memory: project_findblock_callback_broken_under_viabackwards.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

runtime/skills/deposit-surplus.js

@@ -13,6 +13,9 @@ const { pathfinder, goals, Movements } = pathfinderPkg;
 
 import { applyProfile, PROFILES } from "../movement-profiles.js";
 import { info, warn } from "../log.js";
+import { findNearestBlockByName } from "../perception.js";
+
+const CHEST_NAMES = ["chest", "trapped_chest"];
 
 const KEEP_ALWAYS_NAME_RE = /(_axe|_pickaxe|_sword|_shovel|_hoe|_bed|bread|cooked_|apple|carrot|potato|wheat_seeds)$/;
 const STORABLE_NAME_RE = /(_log$|_stem$|cobblestone|cobbled_deepslate|deepslate|stone$|dirt|sand|gravel|wheat$|_planks$|stick$)/;
@@ -61,19 +64,13 @@ export const skill = Object.freeze({
 		if (!ctx?.bot) return { ok: false, code: "no_bot", detail: "bot missing" };
 		const surplus = pickSurplus(ctx.bot);
 		if (surplus.length === 0) return { ok: false, code: "nothing_to_deposit", detail: "no surplus stacks" };
-		const chest = ctx.bot.findBlock({
-			matching: (b) => b?.name === "chest" || b?.name === "trapped_chest",
-			maxDistance: 24,
-		});
+		const chest = findNearestBlockByName(ctx.bot, CHEST_NAMES, { maxDistance: 24 });
 		if (!chest) return { ok: false, code: "no_chest", detail: "no chest within 24 blocks" };
 		return { ok: true };
 	},
 	async execute(ctx) {
 		const bot = ctx.bot;
-		const chest = bot.findBlock({
-			matching: (b) => b?.name === "chest" || b?.name === "trapped_chest",
-			maxDistance: 24,
-		});
+		const chest = findNearestBlockByName(bot, CHEST_NAMES, { maxDistance: 24 });
 		if (!chest) return { ok: false, code: "no_chest", detail: "no chest after move", worldDelta: null };
 
 		ensurePathfinder(bot);