[Roxas2712]

Portable scripts can now use play_sound, wait_sound, play_music, stop_music, fade_music, play_once and play_default_music on generations 1–3. Every cue is checked before admission and again at dispatch; native sources and music controllers handle playback, while bounded foreground waits prevent stalled audio from hanging a mod.

Depends on #117 (and its prerequisites). Merge that first. Implementation-only review: https://github.com/Roxas2712/Gen2Recomped/compare/1a09b6c7847a723805fd39e88ea0be17f5dc7795...1fa9d59d90fbb6391a4a6cf994de56c016f40436

Adds native Gen3 sequence-name/index resolution with ambiguity checks and native effect/file dispatch. Options are copied and validated. Retired scripts cannot resume or arm keepMusicOnce after a reentrant unload. Audio already committed to the native controller remains engine-owned.

Validation:

• 135 focused assertions, including actual Sound dispatch/cache and Music one-shot/restore through a fake audio-device boundary.
• 152 cross-engine comparisons / 304 isolated runs against pinned Gen1Recomp 79ea62f, all eight supported versions; exact clean feature and combined integration heads.
• Feature: 92/102 engine suites. Combined integration: 97/107. Both retain exactly the baseline's 17 failed assertions and 10 failed suites; SDK 3/3 and B30 pass.
• Formatting and git diff checks pass. No imported-ROM or PCM/audio-equivalence claim.

Gen1's Gen3 resolver accepts an unknown string as truthy during preflight; this implementation requires an actual native definition instead. Fade control follows the host controller, not a claim of identical waveform timing. Deferred dialogue cues are a separate follow-up.

Hosted Actions await maintainer approval for this fork (action_required); no hosted pass is claimed: API 3 contracts, ci.