added dbip_download github workflow

.github/workflows/dbip_download.yml

@@ -0,0 +1,52 @@
+name: Download DBIP data and generate dbip_country.rs
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Runs at midnight on the 3rd of every month
+
+env:
+  TEMP_DIR: '/tmp'
+  YEAR_MONTH: '01-9999'
+
+permissions:
+  contents: write
+
+jobs:
+  generate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+
+      - name: Download DBIP data in MMDB format
+        run: |
+          cd ip_country
+          export YEAR_MONTH=$(date +%Y-%m)
+          echo "TEMP_DIR=$(mktemp -d)" >> $GITHUB_ENV
+          echo "YEAR_MONTH=$YEAR_MONTH" >> $GITHUB_ENV
+          mkdir -p dbip-data
+          curl -L -o dbip-data/dbip-country-lite.mmdb.gz "https://download.db-ip.com/free/dbip-country-lite-$YEAR_MONTH.mmdb.gz"
+          gunzip dbip-data/dbip-country-lite.mmdb.gz
+
+      - name: Generate Rust source file
+        run: |
+          cd ip_country
+          cargo run < "dbip-data/dbip-country-lite.mmdb" > "$TEMP_DIR"/dbip_country.rs
+          ls "$TEMP_DIR"
+
+      - name: Commit and push generated file
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git checkout -B generated-source
+          git rm -rf .
+          mkdir ip_country/src
+          mv "${TEMP_DIR}"/dbip_country.rs ip_country/src/dbip_country.rs
+          git add ip_country/src/dbip_country.rs
+          git commit -m "Update generated dbip_country ${YEAR_MONTH} Rust source file"
+          git push -u origin HEAD