fix(cli): honor page size for filtered cleanup

[nightcityblade]

Summary

• pass the configured page_size to tag- and prefix-filtered cleanup queries
• add a parametrized regression test covering both filtered branches

Why

cleanup-dataset --tags and --prefix silently used DocumentService's default limit of 1000 instead of RAGFLOW_PAGE_SIZE. Deployments configured above that default could therefore under-delete matching documents without warning. The unfiltered branch already honors the configured page size; this makes all three paths consistent.

Validation

• PYTHONPATH=src/rosetta-cli venv/bin/python -m pytest -q src/rosetta-cli/tests/test_cleanup_command.py src/rosetta-cli/tests/test_command_auth_order.py — 5 passed
• PYTHONPATH=src/rosetta-cli venv/bin/python -m pytest -q src/rosetta-cli/tests — 39 passed
• uvx ruff check src/rosetta-cli/tests/test_cleanup_command.py — passed
• uvx ruff check --select E9,F63,F7,F82 src/rosetta-cli/rosetta_cli/commands/cleanup_command.py — passed
• uvx ruff format --check src/rosetta-cli/tests/test_cleanup_command.py — passed
• ROSETTIFY_PLUGINS_LOG_LEVEL=warn venv/bin/python scripts/pre_commit.py — passed

Checklist

• Scope is narrow and explicit
• New behavior has regression coverage
• Local validation passes
• Commit includes the required DCO sign-off

AI assistance was used to inspect the issue, implement the focused change, and run validation. I reviewed every changed line.

Closes #267