feature: z-image, flux-2-pro. Updated houdini and nuke clients. Some schema simplification

[JoeGaffney]

No description provided.

[Copilot]

Pull request overview

This PR refactors the video model capabilities system and removes RunwayML integration. The key changes include:

• Removed the runway-act-two model and the runwayml Python dependency
• Refactored video mode inference from first-last-image being a distinct mode to last_image being a capability flag
• Added new image models: z-image (local) and flux-2-pro (external)
• Consolidated Provider type definition into common.schemas to eliminate duplication
• Removed style-plus reference mode and mask support from IP adapters
• Simplified system prompts for text generation
• Updated Nuke and Houdini clients to reflect API changes

Reviewed changes

Copilot reviewed 50 out of 53 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
workers/videos/schemas.py	Refactored InferredMode to remove first-last-image; added last_image capability flag to model metadata
workers/videos/tasks.py	Removed runway_act_two task definition
workers/videos/external/runway_act_two.py	Deleted entire RunwayML Act Two integration
workers/requirements.txt	Removed runwayml dependency; updated diffusers commit hash
workers/common/schemas.py	Added centralized Provider type definition
workers/images/schemas.py	Added z-image and flux-2-pro models; removed style-plus reference mode and mask field
workers/images/local/z_image.py	New implementation for Z-Image model
workers/images/external/flux_2_pro.py	New implementation for Flux 2 Pro via Replicate
workers/images/adapters.py	Removed mask processing logic from IP adapters
workers/tests/general/test_validators.py	Updated validation tests to reflect schema changes
clients/nuke/python/utils.py	Refactored reference handling to inline configuration instead of separate nodes
clients/nuke/gizmos/*.gizmo	Updated Nuke node UI to match API changes
clients/houdini/python/*.py	Updated Houdini integration to match API changes
docker-compose*.yml	Removed RUNWAYML_API_SECRET environment variable

Comments suppressed due to low confidence (2)

workers/tests/utils.py:26

• The change to the output path structure creates a subdirectory for each model, but ensure_path_exists(output_name) is only called after attempting to remove an existing file. If the directory doesn't exist yet, the os.remove() call on line 25 won't fail, but the path construction assumes the directory hierarchy exists. Consider calling ensure_path_exists() before attempting any file operations to ensure the directory structure is created first.
  workers/images/local/z_image.py:2
• Import of 'Flux2Pipeline' is not used.

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