fix: cache pg install step

Author: Xetera

action.yaml

@@ -57,16 +57,28 @@ runs:
         sudo make install # Use sudo to install globally
         cd ${{ github.action_path }} # Return to action directory
 
-    - name: Start PostgreSQL
+    - name: Cache postgresql-client
+      uses: actions/cache@v4
+      id: pg-client-cache
+      with:
+        path: /usr/lib/postgresql
+        key: pg-client-${{ runner.os }}-18
+
+    - name: Install postgresql-client
       shell: bash
+      if: steps.pg-client-cache.outputs.cache-hit != 'true'
       run: |
-        PORT=$(shuf -i 10000-65000 -n 1)
-        echo "PG_PORT=$PORT" >> $GITHUB_ENV
         sudo apt-get install -y curl ca-certificates
         curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo gpg --dearmor -o /usr/share/keyrings/postgresql.gpg
         echo "deb [signed-by=/usr/share/keyrings/postgresql.gpg] https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" | sudo tee /etc/apt/sources.list.d/pgdg.list
         sudo apt-get update
         sudo apt-get install -y postgresql-client-18 || sudo apt-get install -y postgresql-client-17
+
+    - name: Start PostgreSQL
+      shell: bash
+      run: |
+        PORT=$(shuf -i 10000-65000 -n 1)
+        echo "PG_PORT=$PORT" >> $GITHUB_ENV
         PG_CLIENT_VERSION=$(ls /usr/lib/postgresql | sort -rn | head -1)
         echo "PG_DUMP_BINARY=/usr/lib/postgresql/${PG_CLIENT_VERSION}/bin/pg_dump" >> $GITHUB_ENV
         echo "PG_RESTORE_BINARY=/usr/lib/postgresql/${PG_CLIENT_VERSION}/bin/pg_restore" >> $GITHUB_ENV