Ship single .mrpack release; drop CurseForge zip export

Users get one SCICRAFT-<tag>.mrpack to import into Prism Launcher.
Dropping the 362MB CurseForge zip eliminates the large-upload 502 that
failed release asset uploads. All 144 mods are bundled (32 CF jars in
overrides) or auto-fetched from Modrinth at import.

.gitea/workflows/build-pack.yaml

@@ -37,23 +37,14 @@ jobs:
 
       - name: Export Modrinth pack
         working-directory: client_pack
-        run: packwiz modrinth export -o ../SciCraft-Modrinth.mrpack --restrictDomains=false
+        run: packwiz modrinth export -o ../SCICRAFT-${GITHUB_REF_NAME}.mrpack --restrictDomains=false
 
-      - name: Export CurseForge pack
-        working-directory: client_pack
-        run: packwiz curseforge export -o ../SciCraft-CurseForge.zip
-
-      - name: Validate CurseForge pack completeness
-        working-directory: client_pack
-        run: python3 ../tools/validate_pack.py . cf ../SciCraft-CurseForge.zip
-
-      - name: Upload pack artifacts
+      - name: Upload pack artifact
         uses: actions/upload-artifact@v3
         with:
           name: scicraft-pack
           path: |
-            SciCraft-Modrinth.mrpack
-            SciCraft-CurseForge.zip
+            SCICRAFT-${GITHUB_REF_NAME}.mrpack
 
       - name: Release
         if: startsWith(github.ref, 'refs/tags/v')
@@ -65,11 +56,9 @@ jobs:
           RELEASE_JSON=$(curl -sS -X POST "$API" \
             -H "$AUTH" \
             -H "Content-Type: application/json" \
-            -d "{\"tag_name\":\"$TAG\",\"name\":\"SCICRAFT $TAG\",\"body\":\"Automated release built from Gitea Actions.\"}")
+            -d "{\"tag_name\":\"$TAG\",\"name\":\"SCICRAFT $TAG\",\"body\":\"Download the .mrpack and import it into Prism Launcher (File > Import Instance > select the file). All mods are bundled or auto-fetched.\"}")
           RELEASE_ID=$(printf '%s' "$RELEASE_JSON" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
-          for f in SciCraft-Modrinth.mrpack SciCraft-CurseForge.zip; do
-            curl -sS -X POST "$API/$RELEASE_ID/assets?name=$(basename "$f")" \
-              -H "$AUTH" \
-              -F "attachment=@$f"
-            echo "Uploaded $f"
-          done
+          curl -sS -X POST "$API/$RELEASE_ID/assets?name=SCICRAFT-${TAG}.mrpack" \
+            -H "$AUTH" \
+            -F "attachment=@SCICRAFT-${TAG}.mrpack"
+          echo "Uploaded SCICRAFT-${TAG}.mrpack"