v0.0.3 (alpha)

Fixes a ship-blocker in v0.0.2 (#70): the `mecatequi-extract-prompt` composite action failed to load because its `description:` contained a literal empty `${{ }}` expression, which GitHub's template engine rejects ("An expression was expected") — so every v0.0.2 reusable-workflow run aborted in the `implement` job before the agent started.

Consumers on v0.0.2 must bump to `@v0.0.3`.

• Reworded the description to drop the empty expression (no behaviour change).
• Added a regression lint (`task lint:action-templates`, wired into CI) that rejects a live empty `${{ }}` in any parsed workflow/action field — actionlint doesn't load composite actions, so it never caught this.
• Hardened `publish.sh`: a failed `gh issue comment` (e.g. an App token lacking `issues: write`) now emits a loud `::error::` annotation instead of silently aborting the publish job before its terminal `exit 0` (root-caused from the first real consumer run).

Full diff: v0.0.2...v0.0.3