Enhance logging for syncback operations and patch applications

- Added detailed logging for syncback operations, including additions, removals, and updates, to improve traceability and debugging.
- Implemented summary logs for patch applications in both the client and server, capturing the number of changes made.
- Enhanced logging in the ChangeBatcher and ApiService to provide insights into property changes and instance updates during syncback processes.
- Improved error handling and logging for VFS events to ensure better visibility of file operations.

plugin/src/ChangeBatcher/encodeInstance.lua

@@ -173,6 +173,11 @@ encodeInstance = function(instance, parentId, _skipPathCheck)
 		return nil
 	end
 
+	-- Log encoding at trace level (very detailed)
+	if not _skipPathCheck then
+		Log.trace("Encoding for syncback: {} ({})", instance:GetFullName(), instance.ClassName)
+	end
+
 	local properties = {}
 
 	-- Always try to encode Attributes and Tags for any instance type
@@ -262,6 +267,18 @@ encodeInstance = function(instance, parentId, _skipPathCheck)
 		end
 	end
 
+	-- Log property count for debugging
+	local propCount = 0
+	for _ in pairs(properties) do
+		propCount += 1
+	end
+	Log.trace(
+		"  Encoded {} with {} properties, {} children",
+		instance.Name,
+		propCount,
+		#children
+	)
+
 	return {
 		parent = parentId,
 		name = instance.Name,

plugin/src/ChangeBatcher/init.lua

@@ -5,6 +5,9 @@
 
 local RunService = game:GetService("RunService")
 
+local Packages = script.Parent.Parent.Packages
+local Log = require(Packages.Log)
+
 local PatchSet = require(script.Parent.PatchSet)
 
 local createPatchSet = require(script.createPatchSet)
@@ -64,8 +67,10 @@ function ChangeBatcher:add(instance, propertyName)
 	if not properties then
 		properties = {}
 		self.__pendingPropertyChanges[instance] = properties
+		Log.trace("ChangeBatcher: tracking changes to {}", instance:GetFullName())
 	end
 
+	Log.trace("ChangeBatcher: property '{}' changed on {}", propertyName, instance:GetFullName())
 	properties[propertyName] = true
 end
 
@@ -96,11 +101,24 @@ function ChangeBatcher:__flush()
 	end
 
 	local patch = createPatchSet(self.__instanceMap, self.__pendingPropertyChanges, self.__syncSourceOnly)
+	self.__pendingPropertyChanges = {}
 
 	if PatchSet.isEmpty(patch) then
 		return nil
 	end
 
+	-- Log summary at debug level
+	local addedCount = 0
+	for _ in pairs(patch.added) do
+		addedCount += 1
+	end
+	Log.debug(
+		"Two-way sync: {} updates, {} additions, {} removals",
+		#patch.updated,
+		addedCount,
+		#patch.removed
+	)
+
 	return patch
 end