Fix RecordRef not open error for E-Document attachments

[Copilot]

Document attachment operations on E-Document pages fail with "The record is not open" because the RecordRef is opened to the table but never initialized with a valid record.

Changes

SubPageLink missing Table ID (EDocument.Page.al, EDocumentPurchaseDraft.Page.al)

• Added "Table ID" = const(Database::"E-Document") to Doc. Attachment List Factbox SubPageLink, matching pattern in OutboundEDocuments.Page.al and InboundEDocuments.Page.al

Incorrect primary key type in EDocument.Get (EDocAttachmentProcessor.Codeunit.al)

• OnAfterGetRefTableForEDocs was calling EDocument.Get(DocumentAttachment."No.") with a text value, but E-Document's PK is Entry No (Integer)
• Fixed to convert text to integer before Get, and only open RecordRef when record exists:

// Before: Opens RecordRef unconditionally, Get fails silently
RecRef.Open(Database::"E-Document");
if EDocument.Get(DocumentAttachment."No.") then
    RecRef.GetTable(EDocument);

// After: Only opens RecordRef when valid record found
if Evaluate(EntryNo, DocumentAttachment."No.") then
    if EDocument.Get(EntryNo) then begin
        RecRef.Open(Database::"E-Document");
        RecRef.GetTable(EDocument);
    end;

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