fix(community/performance): correct httpclient and oncompanyopen good samples

httpclient-inside-write-transaction-holds-locks.good.al
- Pass Customer.RecordId as the last argument to CreateTask so the task
  is bound to the single customer that was written, not to all customers.
- Declare TableNo = Customer on the task codeunit so the platform loads
  the bound record into Rec automatically when OnRun executes.
- Replace the FindSet loop over all customers with Rec."No.", preserving
  the one-customer scope of the original SyncCustomerLastName procedure.

oncompanyopen-subscribers-must-not-do-io.good.al
- Replace Session.GetCurrentClientType() with Session.CurrentClientType(),
  the correct platform method name.
- Fix the idempotency check: TaskScheduler.TaskExists() requires a Guid,
  not a codeunit integer ID. Store the Guid returned by CreateTask in
  IsolatedStorage (DataScope::Company) under a fixed key; on the next
  login read it back as Text, Evaluate it to Guid, and pass that Guid to
  TaskExists so the type matches the method signature.

community/knowledge/performance/httpclient-inside-write-transaction-holds-locks.good.al

@@ -5,22 +5,21 @@ codeunit 50100 "HttpClient Holds Locks Good"
     begin
         Customer."Search Name" := Customer.Name;
         Customer.Modify(false);
-        TaskScheduler.CreateTask(Codeunit::"Customer Sync Task", 0, true, CompanyName(), CurrentDateTime());
+        // RecordId binds the task to this specific customer; the platform loads it into Rec on OnRun.
+        TaskScheduler.CreateTask(Codeunit::"Customer Sync Task", 0, true, CompanyName(), CurrentDateTime(), Customer.RecordId);
     end;
 }
 
 codeunit 50101 "Customer Sync Task"
 {
+    TableNo = Customer;
+
     trigger OnRun()
     var
         Client: HttpClient;
-        Customer: Record Customer;
         Response: HttpResponseMessage;
     begin
-        // Separate session: no write-transaction lock is held during the HTTP call.
-        if Customer.FindSet() then
-            repeat
-                Client.Get(StrSubstNo('https://example.local/sync/%1', Customer."No."), Response);
-            until Customer.Next() = 0;
+        // Separate session: Rec is the single customer passed via RecordId; no write-transaction lock is held.
+        Client.Get(StrSubstNo('https://example.local/sync/%1', Rec."No."), Response);
     end;
 }