Fix RemoveDataItem on nested paths without context and PostData for object types

[Copilot]

Drapo's data manipulation functions broke down when used with complex nested objects as a single source of truth: RemoveDataItem silently failed on nested array paths without a d-for context, and PostData wrapped object-type data in {Entities: ...} instead of posting the raw object graph.

Changes

DrapoFunctionHandler.ts — ExecuteFunctionRemoveDataItem

• When contextItem is null and the source is a nested mustache path (mustacheParts.length > 1, e.g. {{workflowprocess.Items}}), now resolves the item via ResolveItemDataPathObject and calls DeleteDataItem with the full path
• Previously called DeleteDataItemArray unconditionally, which iterates dataItem.Data.length — undefined for an object type — so the loop never ran and the deletion silently returned false
• Flat-array removals without context (RemoveDataItem({{values}}, 4)) are unaffected

DrapoStorage.ts — PostData

• For non-UnitOfWork, non-array (object) data items, now posts dataItem.Data directly instead of {Entities: dataItem.Data}
• Array data items continue to post {Entities: [...]} and UnitOfWork items post {Inserted/Updated/Deleted} as before
• Aligns PostData with PostDataItem semantics for object types

// Previously failed silently — contextItem is null, DeleteDataItemArray can't navigate nested paths
await app.FunctionHandler.ResolveFunctionWithoutContext(
    sector, el,
    `RemoveDataItem({{workflowprocess.Items}}, {{selectedItem}})`
);

// PostData now sends the full nested graph directly, not wrapped in {Entities: ...}
await app.FunctionHandler.ResolveFunctionWithoutContext(sector, el, `PostData(workflowprocess)`);

Tests Added

• FunctionRemoveDataItemMustacheWithoutContext — startup adds an item without cloning (preserving reference), button click removes it via nested path without context; validates [John, Mary, Thiago] after removal
• FunctionPostDataObjectNested — round-trips a nested object (Code, Name, Items[]) through a new SetFunctionPostDataObjectNested endpoint; validates the server receives and mutates the raw object