fix(ci): Remove internet-dependent rust/sccache installation steps

- alm-ci has Rust and tools pre-installed offline
- Remove sccache download from GitHub releases
- Remove sccache server startup and stats display

.forgejo/workflows/botserver.yaml

@@ -61,27 +61,11 @@ jobs:
           sudo apt-get update -qq
           sudo apt-get install -y libpq-dev libssl-dev liblzma-dev pkg-config
 
-      - name: Setup PATH for pre-installed tools
-        run: |
-          echo "$HOME/.cargo/bin" >> $GITHUB_PATH
-          echo "/usr/local/bin" >> $GITHUB_PATH
-
-      - name: Build BotServer
-          if [ ! -f $HOME/.cargo/bin/sccache ]; then
-            wget -q https://github.com/mozilla/sccache/releases/download/v0.8.2/sccache-v0.8.2-x86_64-unknown-linux-musl.tar.gz
-            tar xzf sccache-v0.8.2-x86_64-unknown-linux-musl.tar.gz
-            mv sccache-v0.8.2-x86_64-unknown-linux-musl/sccache $HOME/.cargo/bin/sccache
-            chmod +x $HOME/.cargo/bin/sccache
-          fi
-          echo "RUSTC_WRAPPER=sccache" >> $GITHUB_ENV
-          $HOME/.cargo/bin/sccache --start-server || true
-
       - name: Build BotServer
         working-directory: /opt/gbo/ci/botserver
         run: |
           cargo build -p botserver --features chat -j 8 2>&1 | tee /tmp/build.log
           ls -lh target/debug/botserver
-          sccache --show-stats || true
 
       - name: Save build log
         if: always()