chore(build): build release binaries in ci

.github/scripts/stage-native-artifacts.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# Copy the per-platform native libraries downloaded as GitHub Actions artifacts
+# into the layout the `include-native-artifacts` Maven profile expects
+# (core/target/native-libs/io/questdb/client/bin/<platform>/), and fail if any
+# expected library is missing or empty.
+set -euo pipefail
+
+downloaded="core/target/downloaded-native-artifacts"
+staged="core/target/native-libs/io/questdb/client/bin"
+
+# platform -> library filename
+declare -A libs=(
+  [darwin-aarch64]=libquestdb.dylib
+  [darwin-x86-64]=libquestdb.dylib
+  [linux-aarch64]=libquestdb.so
+  [linux-x86-64]=libquestdb.so
+  [windows-x86-64]=libquestdb.dll
+)
+
+for platform in "${!libs[@]}"; do
+  lib="${libs[$platform]}"
+  src="${downloaded}/native-${platform}/${lib}"
+  dst_dir="${staged}/${platform}"
+
+  if [[ ! -s "${src}" ]]; then
+    echo "::error::Missing or empty native artifact: ${src}"
+    exit 1
+  fi
+
+  mkdir -p "${dst_dir}"
+  cp "${src}" "${dst_dir}/${lib}"
+  echo "Staged ${platform}/${lib}"
+done