chore: scanner-tooltip pokes, honest pass stats, drop dead code, ISO timestamps

- Items/MysticScrolls: use the dedicated hidden scanner tooltip for the
  server-query poke instead of the global GameTooltip
- Items: count cache hits and this-pass resolutions separately so the
  pass 2+ chat output no longer claims old hits as new
- Core: remove dead tiny_json_encode fallback (Util/Json.lua loads first
  in the TOC and always defines CoaExporter_Json_Encode)
- Catalogs/Common: ctx.startedAt now ISO 8601 UTC like every other
  exporter timestamp

CoaExporter/Catalogs/Common.lua

@@ -100,7 +100,7 @@ function C.Run(filter, callback)
     playerClassFile = playerClassFile or "UNKNOWN"
 
     local ctx = {
-        startedAt = date(),
+        startedAt = date("!%Y-%m-%dT%H:%M:%SZ"),
         filter = filter or "all",
         playerClass = playerLocalizedClass,
         playerClassFile = playerClassFile,

CoaExporter/Collectors/Items.lua

@@ -88,11 +88,9 @@ local function TryResolve(itemID)
     local name, link, quality, iLevel, reqLevel, class, subclass, maxStack,
           equipSlot, texture, sellPrice = GetItemInfo(itemID)
     if not name then
-        -- Trigger the server-side ITEM_QUERY_SINGLE; this is also what writes
-        -- the row into itemcache.wdb.
-        GameTooltip:SetOwner(WorldFrame, "ANCHOR_NONE")
-        GameTooltip:SetHyperlink("item:" .. itemID)
-        GameTooltip:Hide()
+        -- Trigger the server-side ITEM_QUERY_SINGLE via the hidden scanner
+        -- tooltip; this is also what writes the row into itemcache.wdb.
+        ScanItemTooltip(itemID)
         return false
     end
     local itemLines = ScanItemTooltip(itemID)
@@ -121,22 +119,28 @@ local function TryResolve(itemID)
     return true
 end
 
--- One synchronous pass over `ids`. Returns counts + the still-unresolved list.
+-- One synchronous pass over `ids`. Returns counts + the still-unresolved
+-- list. `resolved` counts everything in the cache (including hits from
+-- earlier passes); `new` counts only ids that resolved during this pass.
 function AE.ItemsScanPass(ids)
+    local cache = CoaExporterItemCache.entries
     local total = #ids
+    local resolved = 0
     local newlyResolved = 0
     local unresolved = {}
     for _, id in ipairs(ids) do
+        local wasCached = cache[id] and cache[id].name ~= nil
         if TryResolve(id) then
-            newlyResolved = newlyResolved + 1
+            resolved = resolved + 1
+            if not wasCached then newlyResolved = newlyResolved + 1 end
         else
             unresolved[#unresolved+1] = id
         end
     end
     CoaExporterItemCache.meta.lastScanAt = time()
-    CoaExporterItemCache.meta.resolved = newlyResolved
+    CoaExporterItemCache.meta.resolved = resolved
     CoaExporterItemCache.meta.unresolved = unresolved
-    return { total = total, resolved = newlyResolved, unresolved = #unresolved }
+    return { total = total, resolved = resolved, new = newlyResolved, unresolved = #unresolved }
 end
 
 -- Multi-pass scan with delays so the server has time to answer queries.
@@ -147,8 +151,8 @@ function AE.ItemsStartScan(ids, callback)
         attempts = attempts + 1
         local stats = AE.ItemsScanPass(ids)
         DEFAULT_CHAT_FRAME:AddMessage(string.format(
-            "CoaExporter items: pass %d/%d - resolved this pass %d/%d (still unresolved: %d)",
-            attempts, maxAttempts, stats.resolved, stats.total, stats.unresolved))
+            "CoaExporter items: pass %d/%d - resolved %d/%d (%d new this pass, still unresolved: %d)",
+            attempts, maxAttempts, stats.resolved, stats.total, stats.new, stats.unresolved))
         if stats.unresolved > 0 and attempts < maxAttempts then
             local t = CreateFrame("Frame")
             local elapsed = 0

CoaExporter/Collectors/MysticScrolls.lua

@@ -77,9 +77,9 @@ local function TryResolve(entry)
     end
     local name, _, quality = GetItemInfo(entry.itemID)
     if not name then
-        GameTooltip:SetOwner(WorldFrame, "ANCHOR_NONE")
-        GameTooltip:SetHyperlink("item:" .. entry.itemID)
-        GameTooltip:Hide()
+        -- Poke the server (ITEM_QUERY_SINGLE) via the hidden scanner so the
+        -- next pass can resolve - no need to touch the global GameTooltip.
+        ScanItemTooltip(entry.itemID)
         return false
     end
     local itemLines = ScanItemTooltip(entry.itemID)

CoaExporter/Core.lua

@@ -128,31 +128,7 @@ end
 function AE:Export(which)
     local normWhich = Norm(which)
     local data = self:AssembleExport(normWhich)
-    local function tiny_json_encode(v)
-        local tv = type(v)
-        if tv == 'nil' then return 'null' end
-        if tv == 'boolean' then return v and 'true' or 'false' end
-        if tv == 'number' then return tostring(v) end
-        if tv == 'string' then
-            local s = v:gsub('\\', '\\\\'):gsub('"', '\\"'):gsub('\n', '\\n'):gsub('\r', '\\r'):gsub('\t', '\\t')
-            return '"' .. s .. '"'
-        end
-        if tv == 'table' then
-            local n = 0
-            for k,_ in pairs(v) do if type(k) ~= 'number' then n = -1 break else n = math.max(n, k) end end
-            if n >= 1 then
-                local parts = {}
-                for i=1,n do parts[#parts+1] = tiny_json_encode(v[i]) end
-                return '[' .. table.concat(parts, ',') .. ']'
-            else
-                local parts = {}
-                for k,val in pairs(v) do parts[#parts+1] = tiny_json_encode(tostring(k)) .. ':' .. tiny_json_encode(val) end
-                return '{' .. table.concat(parts, ',') .. '}'
-            end
-        end
-        return 'null'
-    end
-    local encoder = _G.CoaExporter_Json_Encode or tiny_json_encode
+    local encoder = _G.CoaExporter_Json_Encode
     local json = encoder(data)
 
     local title = "CoaExporter"