[Maintenance] - Task Reminders Grouped Slack Link

Description

Now that we have the global task board, one really cool feature would be automatically generating global task page links whenever we send out tasks reminders to a channel, that way we can have one link that people could click from that slack message to see all the tasks that pertain to that channel

For example if I have two projects that both ping #software_finishline, we could have the task reminder message have a link to the global task page filtered by those two projects

Acceptance Criteria

When the upcoming task deadlines message is sent, it includes a link to the global task dashboard filtered to that teams project (ie all the tasks that were in the deadline notification).

Proposed Solution

• new shared util src/shared/src/utils/task-filters.utils.ts to serialize/deserialize task filters into a URL query string, moved out of task-filters.hooks.ts so the frontend and backend share one implementation
• update sendTaskDeadlineSlackNotifications in notifications.services.ts to also group the projects associated with each Slack channel (based on a teams slackId), and attach a link button to that channel's filtered task board on the reminder message

Mocks

No response