ci: fix release asset upload to use multipart form, handle existing releases

.github/workflows/build.yml

@@ -42,14 +42,22 @@ jobs:
           GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           TAG: ${{ github.ref_name }}
         run: |
+          # Reuse existing release if already created (handles re-runs)
+          RESPONSE=$(curl -s \
+            "https://git.mithraic.cloud/api/v1/repos/ad3laid3/sanctum/releases/tags/$TAG" \
+            -H "Authorization: token $GITEA_TOKEN")
+          RELEASE_ID=$(echo "$RESPONSE" | grep -o '"id":[0-9]*' | head -1 | grep -o '[0-9]*')
+
+          if [ -z "$RELEASE_ID" ]; then
             RESPONSE=$(curl -sf -X POST \
               "https://git.mithraic.cloud/api/v1/repos/ad3laid3/sanctum/releases" \
               -H "Authorization: token $GITEA_TOKEN" \
               -H "Content-Type: application/json" \
               -d "{\"tag_name\":\"$TAG\",\"name\":\"Sanctum $TAG\",\"draft\":false,\"prerelease\":false}")
-
             RELEASE_ID=$(echo "$RESPONSE" | grep -o '"id":[0-9]*' | head -1 | grep -o '[0-9]*')
-          echo "Created release ID: $RELEASE_ID"
+          fi
+
+          echo "Release ID: $RELEASE_ID"
 
           find out/make -type f -name "*.zip" | while read FILE; do
             NAME=$(basename "$FILE")
@@ -57,6 +65,5 @@ jobs:
             curl -sf -X POST \
               "https://git.mithraic.cloud/api/v1/repos/ad3laid3/sanctum/releases/$RELEASE_ID/assets?name=$NAME" \
               -H "Authorization: token $GITEA_TOKEN" \
-              -H "Content-Type: application/octet-stream" \
-              --data-binary "@$FILE"
+              -F "attachment=@$FILE"
           done