feat(media-use): v2 media OS core (resolve cascade, providers, local generation, telemetry) + retire hyperframes-media

skills/media-use/audio/assets/sfx/CREDITS.md

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+# SFX Credits
+
+All sound effects in this directory are sourced from [Pixabay](https://pixabay.com/sound-effects/) and used under the [Pixabay Content License](https://pixabay.com/service/license-summary/).
+
+The Pixabay license allows free use for commercial and non-commercial purposes without attribution, but attribution is appreciated and given here for transparency.
+
+## Files
+
+The following `.mp3` files are bundled with this skill:
+
+- `chime.mp3`
+- `click.mp3` / `click-soft.mp3`
+- `error.mp3`
+- `glitch-1.mp3` / `glitch-2.mp3` / `glitch-3.mp3`
+- `impact-bass-1.mp3` / `impact-bass-2.mp3`
+- `key-press.mp3`
+- `notification.mp3`
+- `ping.mp3`
+- `pop.mp3`
+- `riser.mp3`
+- `sparkle.mp3`
+- `typing.mp3`
+- `whoosh.mp3` / `whoosh-short.mp3` / `whoosh-cinematic.mp3`
+
+See `manifest.json` for per-file metadata (duration, energy character, recommended use).
+
+## License
+
+All files are distributed under the [Pixabay Content License](https://pixabay.com/service/license-summary/), which permits:
+
+- Commercial and non-commercial use
+- Modification and remixing
+- Redistribution as part of derivative works (such as videos rendered with HyperFrames)
+
+without any attribution requirement.