BeatSprig 1.0.1 native source and original notices

Preferred native source inputs and original notices for BeatSprig 1.0.1, tied to application commit ca996c5811415ec4a1272114715a53e2dec85afd.

This release contains 17 exact source archives: the eleven vcpkg source inputs, pinned vcpkg recipes/helpers, QtBase/QtSvg/QtTools 6.11.2, hiir and ringbuffer. source-release.json records their immutable revisions, SHA256, SHA512 and sizes. SOURCE.md describes building, modifying and installing the application. The original-notices archive preserves upstream license and attribution bytes, including the application's original GPLv2-or-later grant and the combined executable's GPLv3 terms.

source-delivery-inputs.json binds the application Git tree, all source archives, additional assets and original notice members. The prepared source manifest is preserved as historical preparation data; a separate public verification receipt records the actual published bytes. QtTools is a build input, and its recorded Assistant gitlink does not describe a shipped Assistant or LLVM runtime.

No application binary is distributed by this source release. Final Windows consumer qualification, exact final package binding and Store submission are separate results.