ci: pull existing .sig files + serialize jobs sharing a db

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -67,8 +67,9 @@ jobs:
           mkdir -p /tmp/arch-stage
           cd /tmp/arch-stage
           rm -f *
-          curl -sSL https://packages.reauktion.de/arch/aarch64/marfrit.db.tar.gz -o marfrit.db.tar.gz || true
-          curl -sSL https://packages.reauktion.de/arch/aarch64/marfrit.files.tar.gz -o marfrit.files.tar.gz || true
+          for f in marfrit.db.tar.gz marfrit.db.tar.gz.sig marfrit.files.tar.gz marfrit.files.tar.gz.sig; do
+            curl -sSLf "https://packages.reauktion.de/arch/aarch64/$f" -o "$f" || rm -f "$f"
+          done
           for ext in xz zst gz; do
             ls /tmp/build-distcc-avahi/*.pkg.tar.$ext 2>/dev/null && \
               mv /tmp/build-distcc-avahi/*.pkg.tar.$ext /tmp/build-distcc-avahi/*.pkg.tar.$ext.sig .
@@ -107,6 +108,7 @@ jobs:
   # db with the package registered.
   # -------------------------------------------------------------------------
   lmcp-any:
+    needs: distcc-avahi-aarch64  # serialize on shared aarch64 db; expand later
     runs-on: arch-aarch64
     steps:
       - uses: actions/checkout@v4
@@ -167,8 +169,9 @@ jobs:
           for target in aarch64 x86_64; do
               stage="/tmp/arch-stage-$target"
               rm -rf "$stage"; mkdir -p "$stage"; cd "$stage"
-              curl -sSL "https://packages.reauktion.de/arch/$target/marfrit.db.tar.gz"    -o marfrit.db.tar.gz    || true
-              curl -sSL "https://packages.reauktion.de/arch/$target/marfrit.files.tar.gz" -o marfrit.files.tar.gz || true
+              for f in marfrit.db.tar.gz marfrit.db.tar.gz.sig marfrit.files.tar.gz marfrit.files.tar.gz.sig; do
+                curl -sSLf "https://packages.reauktion.de/arch/$target/$f" -o "$f" || rm -f "$f"
+              done
               cp /tmp/build-lmcp/*.pkg.tar.* .
               pkgs=()
               for ext in xz zst gz; do