replace poll-until-cancel OnUpdate frames with C_Timer / RunNextFrame

Seven ad-hoc OnUpdate handlers were only spinning long enough to reach
a known deadline or a next-frame defer, then unhooking themselves.
Convert them to their proper primitives:

- autovendor: 0.3s wait after junk sell → C_Timer.After(0.3, ...)
- innervatecall: cooldown-expiry ready ping → C_Timer.After(cd, ...)
- focus: re-arm UI_ERROR_MESSAGE next tick → RunNextFrame
- macrotweak: conflict scan after addons load → RunNextFrame
- ui-widgets (CreateQuestionDialog): font-measure resize → RunNextFrame
- libdebuff: post-PEW Nampower init → RunNextFrame
- bubbles: WorldFrame scan after chat event → RunNextFrame

Net -18 lines and no more throwaway frames sitting on the OnUpdate list.

modules/autovendor.lua

@@ -19,12 +19,7 @@ pfUI:RegisterModule("autovendor", function ()
     local startGold = GetMoney()
     C_MerchantFrame.SellAllJunkItems()
 
-    local reporter = CreateFrame("Frame")
-    reporter.deadline = GetTime() + 0.3
-    reporter:SetScript("OnUpdate", function()
-      if GetTime() < this.deadline then return end
-      this:SetScript("OnUpdate", nil)
-      this:Hide()
+    C_Timer.After(0.3, function()
       local income = GetMoney() - startGold
       if income > 0 then
         DEFAULT_CHAT_FRAME:AddMessage(T["Your vendor trash has been sold and you earned"] .. " " .. CreateGoldString(income))