feat: add title and description to gh-attach-assets release

When the release-asset strategy creates the dummy release for the first
time, it now sets a clear title ('gh-attach image assets') and a body
that explains the release is used as asset storage and should not be
deleted.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Addono

openspec/specs/core/spec.md

@@ -80,6 +80,8 @@ The system SHALL support uploading images as GitHub release assets via the offic
 - AND no existing image-assets release in the target repository
 - WHEN `upload(file, target)` is called
 - THEN the system SHALL create a prerelease (non-draft) tagged `_gh-attach-assets`
+- AND the release SHALL have the title `"gh-attach image assets"`
+- AND the release SHALL have a body explaining it is a dummy release used by gh-attach as storage for image assets, and that it should not be deleted
 - AND upload the image as a release asset
 - AND return the asset download URL
 

src/core/strategies/releaseAsset.ts

@@ -141,7 +141,8 @@ async function findOrCreateAssetsRelease(
           owner: target.owner,
           repo: target.repo,
           tag_name: ASSETS_TAG,
-          name: "Image Assets",
+          name: "gh-attach image assets",
+          body: "This is a dummy release used by [gh-attach](https://github.com/Addono/gh-attach) as storage for image assets attached to issues and pull requests.\n\n> [!WARNING]\n> Do not delete this release or its assets — doing so will break image embeds that reference them.",
           draft: false,
           prerelease: true,
         });

test/unit/core/strategies/releaseAsset.test.ts

@@ -166,7 +166,8 @@ describe("Release Asset Strategy", () => {
           owner: mockTarget.owner,
           repo: mockTarget.repo,
           tag_name: "_gh-attach-assets",
-          name: "Image Assets",
+          name: "gh-attach image assets",
+          body: "This is a dummy release used by [gh-attach](https://github.com/Addono/gh-attach) as storage for image assets attached to issues and pull requests.\n\n> [!WARNING]\n> Do not delete this release or its assets — doing so will break image embeds that reference them.",
           draft: false,
           prerelease: true,
         },