ci: remove build job, let each test group cache independently

Each test group now has its own cache key (os-group) ensuring
consistent feature sets. This avoids the feature mismatch issue
between --workspace and -p flags.

Author: xdustinface

.github/workflows/build-and-test.yml

@@ -12,44 +12,8 @@ on:
         default: ""
 
 jobs:
-  build:
-    name: "build (${{ inputs.os }})"
-    runs-on: ${{ inputs.os }}
-    steps:
-      - uses: actions/checkout@v6
-      - name: Disable Windows Defender real-time monitoring
-        if: runner.os == 'Windows'
-        run: Set-MpPreference -DisableRealtimeMonitoring $true
-        shell: pwsh
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
-        with:
-          prefix-key: "v3-rust"
-          shared-key: "${{ inputs.os }}"
-          cache-on-failure: true
-          cache-all-crates: true
-      - name: Debug cache state (before build)
-        run: |
-          echo "=== GIT CHECKOUTS (blsful) ==="
-          ls -la ~/.cargo/git/checkouts/agora-blsful*/*/src/lib.rs 2>/dev/null || echo "No blsful checkout"
-          echo "=== fingerprint count ==="
-          ls target/debug/.fingerprint/ 2>/dev/null | wc -l || echo "No fingerprints"
-          echo "=== COMPILED ARTIFACTS (deps/) ==="
-          ls target/debug/deps/ 2>/dev/null | wc -l || echo "No deps dir"
-        shell: bash
-      - name: Build workspace
-        run: cargo test --workspace --all-features --no-run ${{ inputs.exclude-crates && format('--exclude {0}', inputs.exclude-crates) || '' }}
-      - name: Debug cache state (after build)
-        run: |
-          echo "=== fingerprint count ==="
-          ls target/debug/.fingerprint/ | wc -l
-          echo "=== sample dep fingerprint (memchr) ==="
-          ls -la target/debug/.fingerprint/memchr-*
-        shell: bash
-
   test:
     name: "test: ${{ matrix.group }} (${{ inputs.os }})"
-    needs: build
     runs-on: ${{ inputs.os }}
     strategy:
       fail-fast: false
@@ -64,30 +28,15 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
         with:
-          prefix-key: "v3-rust"
-          shared-key: "${{ inputs.os }}"
-          save-if: false
+          prefix-key: "v4-rust"
+          shared-key: "${{ inputs.os }}-${{ matrix.group }}"
+          cache-on-failure: true
           cache-all-crates: true
-      - name: Debug cache state (after cache restore)
-        run: |
-          echo "=== GIT CHECKOUTS (blsful) ==="
-          ls -la ~/.cargo/git/checkouts/agora-blsful*/*/src/lib.rs 2>/dev/null || echo "No blsful checkout"
-          echo "=== fingerprint count ==="
-          ls target/debug/.fingerprint/ 2>/dev/null | wc -l || echo "No fingerprints"
-          echo "=== COMPILED ARTIFACTS (deps/) ==="
-          ls target/debug/deps/ 2>/dev/null | wc -l || echo "No deps dir"
-        shell: bash
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
           cache: "pip"
           cache-dependency-path: .github/scripts/requirements.txt
       - run: pip install -r .github/scripts/requirements.txt
-      - name: Test cargo directly (debug)
-        if: matrix.group == 'spv'
-        run: |
-          echo "=== Checking what features cargo resolves ==="
-          cargo tree -p dash-spv --all-features -e features 2>&1 | grep -E "blsful|blstrs" | head -20
-        shell: bash
       - name: Run tests
         run: python .github/scripts/ci_config.py run-group ${{ matrix.group }} --os ${{ inputs.os }}