Release 5.5.0

Also stops one benign libmpv message being logged as an error: `after
creating texture: OpenGL error INVALID_ENUM` comes from the GL driver, arrives
several times per playback start and per fullscreen toggle, and playback
continues regardless. Hundreds of lines a session buried the errors that
matter -- it is a debug line now.

Verified end to end on the real display with an actual video playing: ten tab
switches and four fullscreen toggles while frames were rendering, position
advancing throughout, the render context intact, no crash, and an empty error
log afterwards.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ytsage/__init__.py

@@ -10,5 +10,5 @@ match `version` in pyproject.toml and the repository's latest signed tag --
 this package's tag line continues YTSage's, which is why it starts at 5.x.
 """
 
-__version__ = "5.4.0"
+__version__ = "5.5.0"
 __author__ = "Houmeres"