Corrective publication for 2026.7.26. The signed v2026.7.26 tag built and
published the versioned builder and test-database images, but Gitea 1.25.4
interpreted the handoff's short v2026.7.26 workflow-dispatch ref as a branch
name and rejected it before the application release workflow could start.
This patch passes the fully qualified immutable Git ref through every
release-critical workflow handoff and adds a fail-closed regression check for
the builder, CI, comprehensive-test, native-sidecar, supported-platform, and
documentation chain. Application behavior, six forward migrations, and the
core-v1 Knowledge Shard application contract are otherwise unchanged. Use
v2026.8.0 for corrected release artifacts (#1098, #1100).