Astralbase v0.1.0-alpha.2 research snapshot

Corrected immutable alpha snapshot. Standalone source builds and CI now use the same reviewed Git pins for Bitmesh and Thermograph; the exact packaged-source smoke test passes. This is not a stable crates.io release.

Astralbase v0.1.0-alpha.1 research snapshot (superseded)

Superseded by v0.1.0-alpha.2, which removes an obsolete CI path override. The source code in this snapshot passed the local suite; its hosted workflow combined Git and path patches and therefore failed before compilation.