Cache nomos binary tarball per node rev

.github/workflows/lint.yml

@@ -7,6 +7,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  NOMOS_NODE_REV: 2f60a0372c228968c3526c341ebc7e58bbd178dd
 
 concurrency:
   group: lint-${{ github.ref }}
@@ -26,6 +27,12 @@ jobs:
       CARGO_TARGET_DIR: ${{ github.workspace }}/.tmp/nomos-target
     steps:
       - uses: actions/checkout@v4
+      - name: Restore cached nomos binaries
+        id: restore-nomos-bins
+        uses: actions/cache@v4
+        with:
+          path: ${{ github.workspace }}/nomos-binaries.tar.gz
+          key: ${{ runner.os }}-nomos-binaries-${{ env.NOMOS_NODE_REV }}
       - name: Install system dependencies (Linux)
         if: runner.os == 'Linux'
         run: |
@@ -47,6 +54,7 @@ jobs:
           key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: ${{ runner.os }}-cargo-
       - name: Build nomos binaries
+        if: steps.restore-nomos-bins.outputs.cache-hit != 'true'
         run: |
           SRC_DIR="${GITHUB_WORKSPACE}/.tmp/nomos-node-src"
           mkdir -p "$SRC_DIR"
@@ -54,18 +62,25 @@ jobs:
             git clone https://github.com/logos-co/nomos-node.git "$SRC_DIR"
           fi
           cd "$SRC_DIR"
-          git fetch --depth 1 origin 2f60a0372c228968c3526c341ebc7e58bbd178dd
-          git checkout 2f60a0372c228968c3526c341ebc7e58bbd178dd
+          git fetch --depth 1 origin "${NOMOS_NODE_REV}"
+          git checkout "${NOMOS_NODE_REV}"
           git reset --hard
           git clean -fdx
           cargo +nightly-2025-09-14 build --all-features -p nomos-node -p nomos-executor -p nomos-cli
       - name: Package binaries
+        if: steps.restore-nomos-bins.outputs.cache-hit != 'true'
         run: |
           mkdir -p artifacts
           cp "${CARGO_TARGET_DIR}/debug/nomos-node" artifacts/
           cp "${CARGO_TARGET_DIR}/debug/nomos-executor" artifacts/
           cp "${CARGO_TARGET_DIR}/debug/nomos-cli" artifacts/
           tar -czf nomos-binaries.tar.gz -C artifacts .
+      - name: Save nomos binaries cache
+        if: steps.restore-nomos-bins.outputs.cache-hit != 'true'
+        uses: actions/cache@v4
+        with:
+          path: ${{ github.workspace }}/nomos-binaries.tar.gz
+          key: ${{ runner.os }}-nomos-binaries-${{ env.NOMOS_NODE_REV }}
       - uses: actions/upload-artifact@v4
         with:
           name: nomos-binaries-linux-amd64