ci(ofelia): override container image-name to preserve GHCR package identity

Template default `image-name: ${{ github.repository }}` would produce
`ghcr.io/netresearch/ofelia` (full owner/repo), but the existing GHCR
package for this repo has been `ghcr.io/netresearch/ofelia` published
as just `ofelia` for years — renaming would orphan all existing image
pulls.

Override image-name to `ofelia` and record it as intentional-drift.

Signed-off-by: Sebastian Mendel <sebastian.mendel@netresearch.de>

Author: CybotTM

.github/template.yaml

@@ -1,5 +1,8 @@
-# Managed by netresearch/.github/templates/go-app/
+# Managed by netresearch/.github/templates/
 # Drift from the template is blocking CI in this repo (check-template-drift.yml).
 # Record explicit exceptions under intentional-drift[] to unblock.
 template: go-app
-intentional-drift: []
+intentional-drift:
+- path: .github/workflows/container.yml
+  reason: "GHCR package name is 'ofelia' (short form), not 'netresearch/ofelia' \u2014\
+    \ pre-dates template; renaming would break existing image consumers."

.github/workflows/container.yml

@@ -15,7 +15,7 @@ jobs:
   container:
     uses: netresearch/.github/.github/workflows/build-container.yml@main
     with:
-      image-name: ${{ github.repository }}
+      image-name: ofelia
       platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
     permissions:
       contents: read