DX-2069: Add label parameter

[CahidArda]

No description provided.

[linear]

DX-2069 workflow/qstash-js - label parameter

[Copilot]

Pull Request Overview

This PR adds label parameter support to the QStash SDK, enabling users to assign labels to messages and schedules for better log filtering and organization.

• Adds optional label parameter to all message publishing and scheduling methods
• Extends data models to include label fields for messages, schedules, logs, and DLQ entries
• Implements comprehensive test coverage for all label functionality across sync and async APIs

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
qstash/message.py	Adds label parameter to message APIs and data models
qstash/schedule.py	Adds label parameter to schedule APIs and Schedule model
qstash/log.py	Adds label field to Log model and LogFilter for filtering
qstash/dlq.py	Adds label field to DlqMessage model and DlqFilter
qstash/asyncio/message.py	Adds label parameter to async message APIs
qstash/asyncio/schedule.py	Adds label parameter to async schedule APIs
tests/test_message.py	Tests label functionality for message operations
tests/test_schedules.py	Tests label functionality for schedule operations
tests/asyncio/test_message.py	Tests label functionality for async message operations
tests/asyncio/test_schedules.py	Tests label functionality for async schedule operations

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