Full Spectrum Observer v0.1.0-alpha

First sealed Observer foundation-kernel alpha.

• IG0-IG8 gates passed
• Dual licensed: MulanPSL-2.0 OR Apache-2.0
• Engine v1.0 deterministic observer boundary
• Release metadata, SBOM, checksums and package verifier included

See docs/release-v0.1.0-alpha.md and docs/testing/IG8_R2_INDEPENDENT_RESULT_2026-07-13.md.