Feature: Add Tag System for user made Workflows

[Pfannkuchensack]

Summary

This PR adds dynamic tag filtering for user workflows in the Workflow Library. Previously, only the "Browse Workflows" view (default workflows) had tag filtering with a fixed set of categories. Now, "Your Workflows" also supports tag filtering, with tags dynamically loaded from the user's actual workflow collection.

Changes:

Backend:

• Added new GET /api/v1/workflows/tags endpoint that returns all unique tags from workflows
• Added get_all_tags() method to WorkflowRecordsStorageBase and SqliteWorkflowRecordsStorage
• Tags are parsed from comma-separated strings stored in workflows

Frontend:

• Added useGetAllTagsQuery hook for the new tags endpoint
• Added WorkflowTags cache tag for proper invalidation
• Modified WorkflowLibrarySideNav to show dynamic tags for "Your Workflows" view and static categories for "Browse Workflows"
• Updated WorkflowList to apply tag filtering for both yours and defaults views
• Added "Your Workflows" button with tag reset functionality (matching "Browse Workflows" behavior)

Related Issues / Discussions

Request from a discord user

QA Instructions

1. Create several user workflows with different tags (comma-separated, e.g., "portrait, SDXL, upscaling")
2. Open the Workflow Library
3. Click "Your Workflows" - you should see all unique tags from your workflows listed with counts
4. Select one or more tags - the workflow list should filter accordingly
5. Verify the reset button appears and works when tags are selected
6. Switch to "Browse Workflows" - verify the static tag categories still work as before
7. Create/update/delete a workflow with tags - verify the tag list updates

Merge Plan

No special merge plan required. This is an additive feature with no breaking changes.

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• ❗Changes to a redux slice have a corresponding migration (no slice changes, only added new API endpoint)
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)

[lstein]

I reviewed code and performed functional testing on my Linux system. Everything seems to be working as advertised. There were initially PR test failures for python 3.11 and 3.12 on Windows, but these were not reproducible, so I'm giving it an approve.