Antaeus v0.7.0

Completed semantic uncertainty now returns review; evaluation and provider errors
remain failures. This minor release introduces Decision/Profile v0alpha2 and
regression ResultSet v0alpha2 while preserving published v0alpha1 contracts.
Upgrade validators, profiles and native/WASM consumers together; see the
migration guide.

Changed

• Breaking: introduce Decision and EvaluatorProfile v0alpha2. Completed indeterminate
  evidence returns review with evaluation.indeterminate_rule; failed evidence
  remains failure and matched deny retains highest precedence. Published
  v0alpha1 contracts remain immutable. The new runtime rejects legacy profiles
  and requests; generated regression result sets use v0alpha2. See the
  migration guide for profile digest,
  trust, validator, regression, native/WASM, and coordinated consumer changes.

• Give the built-in local fixture profile a new v0alpha2 identity and digest.

Security

• Update the pinned validation toolchains to Go 1.26.9 and 1.27.2 and the
  preferred development/release toolchain to Go 1.27.2 for upstream
  standard-library security fixes. Keep the Go 1.26.0 module language floor.
  See the advisory record
  for the ten reported GO-IDs and fixed-in versions.
• Update indirect golang.org/x/text to v0.41.0 for GO-2026-6629. The reported
  affected package was not imported in the scanned build configuration.