Consolidate FrameProcessingResult and VideoProcessingResult

[eliteprox]

There is duplication across frame handling that could be kept in frames.py

pytrickle/pytrickle/frame_skipper.py

Lines 19 to 21 in 08b375e

	class FrameProcessingResult(Enum):
	"""Explicit result types for frame processing operations."""
	SKIPPED = "skipped" # Frame was skipped due to adaptive logic

pytrickle/pytrickle/stream_processor.py

Lines 14 to 16 in 08b375e

	class VideoProcessingResult(Enum):
	"""Explicit result to distinguish intentional frame withholding from errors."""
	WITHHELD = "withheld"

[linear]

COMFY-260