Fix mining turtle: use pull instead of push to avoid self-wrap failure

peripheral.wrap(selfName) can return nil on some turtles even when
connected. Switch to wrapping the remote chest and calling
chest.pullItems(selfName, slot) instead.

miningTurtle.lua

@@ -98,12 +98,6 @@ if not modem or not selfName then
     return fatal("[ERR] No wired modem found!\n      Attach a wired modem to the turtle\n      and connect it to the network.")
 end
 
--- Wrap our own inventory peripheral for pushItems
-local selfInv = peripheral.wrap(selfName)
-if not selfInv then
-    return fatal("[ERR] Cannot wrap own peripheral: " .. selfName .. "\n      Make sure the wired modem is connected.")
-end
-
 print("[OK]   Modem: " .. modemSide)
 print("[OK]   Network name: " .. selfName)
 print("[OK]   Mine interval: " .. MINE_INTERVAL .. "s")
@@ -128,6 +122,9 @@ end
 
 -------------------------------------------------
 -- Dump inventory into networked storage
+-- Uses pull approach: wrap the remote chest and call
+-- chest.pullItems(selfName, slot) — avoids needing
+-- to wrap the turtle's own peripheral.
 -------------------------------------------------
 
 local function dumpInventory()
@@ -141,11 +138,14 @@ local function dumpInventory()
     for slot = 1, 16 do
         if slot ~= FUEL_SLOT and turtle.getItemCount(slot) > 0 then
             for _, chestName in ipairs(chests) do
-                local ok, n = pcall(selfInv.pushItems, chestName, slot)
-                if ok and n and n > 0 then
-                    totalPushed = totalPushed + n
-                    if turtle.getItemCount(slot) == 0 then
-                        break  -- slot empty, move to next
+                local chest = peripheral.wrap(chestName)
+                if chest and chest.pullItems then
+                    local ok, n = pcall(chest.pullItems, selfName, slot)
+                    if ok and n and n > 0 then
+                        totalPushed = totalPushed + n
+                        if turtle.getItemCount(slot) == 0 then
+                            break  -- slot empty, move to next
+                        end
                     end
                 end
             end