ci: Refactor timelord action to use git-warp-time fallback

Updates the timelord action to fall back to git-warp-time when the cache
is completely empty, enabling timestamp restoration even on fresh builds.
Simplifies the interface by making inputs optional with sensible defaults
and adds Docker integration via buildkit-cache-dance.

.forgejo/workflows/release-image.yml

@@ -150,10 +150,7 @@ jobs:
           echo "Commit timestamp: $timestamp"
 
       - uses: ./.forgejo/actions/timelord
-        if: ${{ env.BUILDKIT_ENDPOINT == '' }}
-        with:
-          key: timelord-v0
-          path: .
+        id: timelord
 
       - name: Cache Rust registry
         if: ${{ env.BUILDKIT_ENDPOINT == '' }}
@@ -202,7 +199,8 @@ jobs:
                 "id": "cargo-target-${{ matrix.target_cpu }}-${{ matrix.slug }}-${{ matrix.profile }}"
               },
               "var-cache-apt-${{ matrix.slug }}": "/var/cache/apt",
-              "var-lib-apt-${{ matrix.slug }}": "/var/lib/apt"
+              "var-lib-apt-${{ matrix.slug }}": "/var/lib/apt",
+              "${{ steps.timelord.outputs.database-path }}": "/root/.cache/timelord"
             }
           skip-extraction: ${{ steps.cache.outputs.cache-hit }}