fix: complete task paging, filters and parent handling

[Optic00]

Make task listing explicit about pagination: --page, --limit and --all support complete retrieval, preserve filters and reject inconsistent page responses. Table/CSV output warns on stderr when results are partial.

Status names resolve in the selected workspace, including negation. Milestone names require an exact, unambiguous workspace match across all pages. Parent keys work in create/edit; task edit --parent 0 sends JSON null to remove the parent, while omission preserves it.

Verified: the complete external CLI test package, focused task tests with the race detector, CLI go vet and go test ./cmd/ws. Real HTTP regression tests on SQLite verify persisted parent removal and preservation, not just a stub response. These tests are on the companion test branch, whose wider migration remains incomplete.

[stefan-ernst]

Hey @Optic00 - thanks!

I'm ready to merge that one in as part of 0.8.8, I just found a minor issue:

if page >= response.Pagination.TotalPages {
if combined == nil {
combined = []Item{}
}
return &PaginatedResponse[Item]{
Data: combined,
Pagination: PaginationMeta{
Page: 1,
PageSize: len(combined),
TotalItems: len(combined),
TotalPages: 1,
},
}, nil
}

if len(combined) == before {
return nil, fmt.Errorf(
"pagination made no progress on page %d; retry the query", page,
)
}

the second condition here should come before the first return, like this:

if page >= response.Pagination.TotalPages {
if len(combined) != response.Pagination.TotalItems {
return nil, fmt.Errorf(
"incomplete pagination: received %d of %d items; retry the query",
len(combined), response.Pagination.TotalItems,
)
}
...
}

[Optic00]

Fixed: --all now checks the number of unique collected items against the final response's total_items before returning success. An incomplete result returns an error without partial output.

The new regression reproduces the original bug and covers empty, duplicate, partial and overfull final pages, plus complete results with and without overlap. The complete CLI package passes with the race detector; go vet passes too.