fix(release): produce linux tarballs matching PKGBUILD source URLs

PKGBUILD expects pgtidy_${pkgver}_linux_{amd64,arm64}.tar.gz containing
the binary and LICENSE. The release job was only uploading plain binaries
(pgtidy-linux-amd64). Now creates tarballs alongside the plain binaries,
uploads both, and updates AUR SHA256 computation to use the tarballs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -55,6 +55,14 @@ jobs:
               -ldflags "-X main.version=${VERSION}" \
               -o "$NAME" ./cmd/pgtidy
             echo "Built $NAME ($(ls -lh "$NAME" | awk '{print $5}'))"
+            if [ "$GOOS" = "linux" ]; then
+              PKGVER="${VERSION#v}"
+              TARNAME="pgtidy_${PKGVER}_${GOOS}_${GOARCH}.tar.gz"
+              cp "$NAME" pgtidy
+              tar czf "$TARNAME" pgtidy LICENSE
+              rm pgtidy
+              echo "Packed $TARNAME"
+            fi
           done
 
       - name: Create release and upload binaries
@@ -85,7 +93,7 @@ jobs:
             exit 1
           fi
 
-          for f in pgtidy-*; do
+          for f in pgtidy-* pgtidy_*.tar.gz; do
             echo "Uploading $f..."
             curl -sf -X POST "${UPLOAD_URL}?name=${f}" \
               -H "Authorization: token ${GITHUB_TOKEN}" \
@@ -266,8 +274,8 @@ jobs:
 
           echo "Publishing pgtidy-bin ${PKGVER}-${PKGREL} to AUR"
 
-          SHA_AMD64=$(curl -fsSL "https://git.warky.dev/wdevs/pgtidy/releases/download/v${PKGVER}/pgtidy-linux-amd64" | sha256sum | cut -d' ' -f1)
-          SHA_ARM64=$(curl -fsSL "https://git.warky.dev/wdevs/pgtidy/releases/download/v${PKGVER}/pgtidy-linux-arm64" | sha256sum | cut -d' ' -f1)
+          SHA_AMD64=$(curl -fsSL "https://git.warky.dev/wdevs/pgtidy/releases/download/v${PKGVER}/pgtidy_${PKGVER}_linux_amd64.tar.gz" | sha256sum | cut -d' ' -f1)
+          SHA_ARM64=$(curl -fsSL "https://git.warky.dev/wdevs/pgtidy/releases/download/v${PKGVER}/pgtidy_${PKGVER}_linux_arm64.tar.gz" | sha256sum | cut -d' ' -f1)
 
           sed -e "s/^pkgver=.*/pkgver=${PKGVER}/" \
               -e "s/^pkgrel=.*/pkgrel=${PKGREL}/" \