Unify SavedVariables into two clean roots with one-time migration

Collapse all legacy/scattered SavedVariables from absorbed standalone
addons (FeedOMatic, ZHunter/zButtons, SmartAmmo, AutoQuest, AntiDaze,
AutoStrip, MinimapButton) into two persisted globals with clean per-module
nesting under .modules.<id>.

Migration engine (api/savedvariables.lua):
- MTH_SV_EnsureSchema() with schemaVersion gate, idempotent + non-destructive
- Per-module migrators map old locations -> canonical nested stores
- Driven by an ADDON_LOADED("MetaHunt") handler so it runs only AFTER WoW
  loads the real SavedVariables (fixes announce-every-session bug that ran
  the migration on empty pre-load defaults)
- One-time player-facing chat announce, gated on real legacy data present

Framework/config:
- core-framework InitSavedVariables no longer runs migration at file-load;
  unconditionally strips account-root module aliases
- config.lua stops re-creating root[module] aliases (was duplicating data
  onto disk); canonical store stays under .modules.<id>

Modules:
- feedomatic: bind FOM_* globals as runtime aliases into nested store,
  drop persisted duplicates and .legacy blob
- zhunter: ZHunterMod_Saved re-pointed at .modules.zhunter
- smartammo/autoquest/antidaze/autostrip/minimapbutton read nested store

TOC trimmed to MTH_SavedVariables + MTH_CharSavedVariables only.
Profiles unchanged (already snapshot/apply the nested .modules structure).

Also includes pet-scan refinements: canonical pet key derivation and
level-independent pet signature (schema v3).

modules/feedomatic/FeedOMatic.lua

@@ -650,58 +650,6 @@ function MTH_GetMerchantFoodsByDiet()
 	return result;
 end
 
-local function FOM_ItemQuality(itemIdOrLink)
-	if (type(GetItemInfo) ~= "function" or itemIdOrLink == nil) then
-		return nil;
-	end
-	local _, _, quality = GetItemInfo(itemIdOrLink);
-	return quality;
-end
-
-local function FOM_DebugLog(message)
-	if (not (FOM_Config and FOM_Config.Debug)) then
-		return;
-	end
-	local text = "[FOM] " .. tostring(message);
-	if (MTH and MTH.Print) then
-		MTH:Print(text, "debug");
-	elseif (DEFAULT_CHAT_FRAME and DEFAULT_CHAT_FRAME.AddMessage) then
-		DEFAULT_CHAT_FRAME:AddMessage(text);
-	end
-	return;
-end
-
-local function FOM_DebugLogMerchantFoods(sourceEvent)
-	local merchantFoods = MTH_GetMerchantFoodsByDiet();
-	local eventLabel = tostring(sourceEvent or "MERCHANT");
-	if (merchantFoods == nil) then
-		FOM_DebugLog(eventLabel .. ": no merchant data available.");
-		return;
-	end
-
-	local knownCount = table.getn(merchantFoods.items or {});
-	local unknownCount = table.getn(merchantFoods.unknown or {});
-	local merchantName = UnitName("npc") or UnitName("target") or "unknown";
-
-	FOM_DebugLog(eventLabel .. ": " .. tostring(merchantName) .. " | known foods=" .. tostring(knownCount) .. " | unknown items=" .. tostring(unknownCount));
-
-	if (type(merchantFoods.byDiet) == "table") then
-		for dietName, foodRows in merchantFoods.byDiet do
-			local dietCount = table.getn(foodRows or {});
-			FOM_DebugLog("diet " .. tostring(dietName) .. ": " .. tostring(dietCount) .. " item(s)");
-			for _, row in foodRows do
-				FOM_DebugLog("  - [" .. tostring(row.id) .. "] " .. tostring(row.name) .. " (merchantIndex=" .. tostring(row.index) .. ")");
-			end
-		end
-	end
-
-	if (unknownCount > 0) then
-		for _, row in merchantFoods.unknown do
-			FOM_DebugLog("unknown food map: [" .. tostring(row.id) .. "] " .. tostring(row.name) .. " (merchantIndex=" .. tostring(row.index) .. ")");
-		end
-	end
-end
-
 function MTH_FOM_FeedButton_OnClick()
 	if (arg1 == "RightButton") then
 		if (MTH_OpenOptions) then
@@ -920,10 +868,6 @@ function FOM_OnEvent(event, arg1)
 		end
 		return;
 
-	elseif ( event == "MERCHANT_SHOW" or event == "MERCHANT_UPDATE" ) then
-		FOM_DebugLogMerchantFoods(event);
-		return;
-
 	elseif ( event == "PET_ATTACK_START" ) then
 	
 		-- Set Flag
@@ -950,7 +894,6 @@ function FOM_OnEvent(event, arg1)
 			end
 			if (foodID) then
 				FOM_LastFood = GFWUtils.ItemLink(foodID);
-				FOM_DebugLog("Manually fed "..FOM_LastFood);
 			end
 		end
 		return;
@@ -1269,31 +1212,24 @@ end
 function FOM_CanFeed()
 	local petInfo = MTH_FOM_GetCorePetInfo();
 	if ( not (petInfo and petInfo.liveExists) ) then
-		FOM_DebugLog("Can't feed; pet doesn't exist.");
 		return false;
 	end
 	if ( tonumber(petInfo.health) and tonumber(petInfo.health) <= 0 ) then
-		FOM_DebugLog("Can't feed; pet is dead.");
 		return false;
 	end
 	if ( UnitHealth("player") <= 0 ) then
-		FOM_DebugLog("Can't feed; I'm dead.");
 		return false;
 	end
 	if ( CastingBarFrameStatusBar:IsVisible() ) then
-		FOM_DebugLog("Can't feed; casting a spell / tradeksill.");
 		return false;
 	end
 	if ( UnitOnTaxi("player") ) then
-		FOM_DebugLog("Can't feed; flying.");
 		return false;
 	end
 	if ( FOM_State.InCombat ) or ( PlayerFrame.inCombat ) then
-		FOM_DebugLog("Can't feed; in combat.");
 		return false;
 	end
 	if ( LootFrame:IsVisible() ) then
-		FOM_DebugLog("Shouldn't feed; loot window is open.");
 		return false;
 	end
 	
@@ -1315,14 +1251,12 @@ function FOM_CanFeed()
 					local name = GetSpellRecField(sid, "name")
 					if name then
 						if dontFeedNames[name] then
-							FOM_DebugLog("Can't feed; buff detected: " .. name)
 							return false
 						end
 						if UnitLevel("player") >= 40 then
 							local lname = string.lower(name)
 							for _, mountSub in FOM_MOUNT_NAME_SUBSTRINGS do
 								if string.find(lname, mountSub) then
-									FOM_DebugLog("Can't feed; mounted (" .. name .. ").")
 									return false
 								end
 							end
@@ -1351,7 +1285,6 @@ function FOM_CanFeed()
 		if ( buff ~= nil) then
 			for _, buffTexture in dontFeedBuffTextures do
 				if ( buff == buffTexture ) then
-					FOM_DebugLog("Can't feed; currently, eating, drinking, or feigning death.");
 					return false;
 				end
 			end
@@ -1364,7 +1297,6 @@ function FOM_CanFeed()
 							msg = string.lower(msg);
 							for _, mountName in FOM_MOUNT_NAME_SUBSTRINGS do
 								if (string.find(msg, mountName)) then
-									FOM_DebugLog("Can't feed; mounted.");
 									return false;
 								end
 							end
@@ -2387,17 +2319,6 @@ function FOM_Feed(aFood, options)
 			foodLevel = selectedFoodLevel,
 		})
 	
-	FOM_DebugLog("Picked "..tostring(FOM_LastFood)
-		.." id="..tostring(selectedId)
-		.." foodLevel="..tostring(selectedFoodLevel)
-		.." itemQuality="..tostring(FOM_ItemQuality(selectedId))
-		.." (bag "..tostring(foodBag)..", slot "..tostring(foodItem)..")"
-		.." reason="..tostring(FOM_LastChoiceReason));
-	if (FOM_Config.Debug) then
-		-- don't actually feed anything, just show what we would choose
-		return false;
-	end
-	
 	-- Actually feed the item to the pet
 	PickupContainerItem(foodBag, foodItem);
 	if ( CursorHasItem() ) then
@@ -2610,19 +2531,6 @@ function FOM_FlatFoodList()
 	if (table.getn(foodList) == 0 and table.getn(overflowFoodList) > 0) then
 		foodList = overflowFoodList;
 	end
-	if (FOM_Config and FOM_Config.Debug) then
-		FOM_DebugLog("Candidate foods for pet level "..tostring(petLevel).." ("..tostring(table.getn(foodList)).." in diet):");
-		for i = 1, table.getn(foodList) do
-			local c = foodList[i];
-			FOM_DebugLog("  ["..tostring(i).."] "..tostring(c.link)
-				.." id="..tostring(c.itemId)
-				.." qty="..tostring(c.count)
-				.." foodLevel="..tostring(c.quality)
-				.." itemQuality="..tostring(FOM_ItemQuality(c.itemId))
-				.." known="..tostring(c.knownLevel)
-				.." useful="..tostring(c.useful));
-		end
-	end
 	return foodList;
 end
 
@@ -2786,12 +2694,10 @@ end
 function FOM_IsUsefulFood(itemID, quantity)
 	local foodName = GetItemInfo(itemID);
 	if (foodName == nil) then
-		FOM_DebugLog("Can't get info for item ID "..itemID..", assuming it's OK to eat.");
 		return false;
 	end
 	if (FOM_Cooking and FOM_Cooking[FOM_RealmPlayer] and FOM_Cooking[FOM_RealmPlayer][itemID]) then
 		if (FOM_Cooking[FOM_RealmPlayer][itemID] >= FOM_Config.SaveForCookingLevel) then
-			FOM_DebugLog("Skipping "..quantity.."x "..foodName.."; is good for cooking.");
 			return true;
 		end
 	end
@@ -2803,19 +2709,15 @@ function FOM_IsUsefulFood(itemID, quantity)
 				FOM_Quantity[foodName] = FOM_Quantity[foodName] + quantity;
 			end
 			if (FOM_Quantity[foodName] > FOM_QuestFood[FOM_RealmPlayer][foodName]) then
-				FOM_DebugLog("Not skipping "..quantity.."x "..foodName.."; is needed for quest, but we have more than enough.");
 				return false;
 			else
-				FOM_DebugLog("Skipping "..quantity.."x "..foodName.."; is needed for quest.");
 				return true;
 			end
 		end
 	end
 	if (FOM_Config.AvoidBonusFood and FOM_IsInDiet(itemID, FOM_DIET_BONUS)) then
-		FOM_DebugLog("Skipping "..quantity.."x "..foodName.."; has bonus effect when eaten by player.");
 		return true;
 	end
-	--FOM_DebugLog("Not skipping "..quantity.."x "..foodName.."; doesn't have other uses.");
 	return false;
 end