fix(release): build RPM from pre-compiled binary with injected version

rpmbuild's %build shell cannot reliably access the Go toolchain or
module cache, risking a 'dev' version string. Build the binary on the
runner (where setup-go is active) with the correct -X main.version
ldflags, then package it via rpmbuild as a binary-install RPM.

Spec changes: Source0/1 are now the binary and LICENSE; %install copies
them directly; removed %prep/%build; -bb instead of -ba (no source RPM).

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

.gitea/workflows/release.yml

@@ -159,8 +159,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
 
       - uses: actions/setup-go@v5
         with:
@@ -174,15 +172,19 @@ jobs:
 
           sudo apt-get install -y rpm
 
-          git archive --format=tar.gz --prefix=pgtidy-${PKGVER}/ HEAD \
-            > pgtidy-${PKGVER}.tar.gz
+          CGO_ENABLED=0 go build \
+            -trimpath \
+            -ldflags "-X main.version=${PKGVER}" \
+            -o pgtidy \
+            ./cmd/pgtidy
 
           sed -i "s/^Version:.*/Version:        ${PKGVER}/" linux/centos/pgtidy.spec
 
           mkdir -p ~/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}
-          cp pgtidy-${PKGVER}.tar.gz ~/rpmbuild/SOURCES/
+          cp pgtidy ~/rpmbuild/SOURCES/pgtidy
+          cp LICENSE ~/rpmbuild/SOURCES/LICENSE
           cp linux/centos/pgtidy.spec ~/rpmbuild/SPECS/
-          rpmbuild --nodeps -ba ~/rpmbuild/SPECS/pgtidy.spec
+          rpmbuild --nodeps -bb ~/rpmbuild/SPECS/pgtidy.spec
 
           mkdir -p rpm-out
           find ~/rpmbuild/RPMS/ -name '*.rpm' -exec cp {} rpm-out/ \;