Update rust.yml, enable caching, disable some steps for now

.github/workflows/rust.yml

@@ -17,6 +17,17 @@ jobs:
       - name: Checkout Code
         uses: actions/checkout@v4
 
+      - name: Cache Cargo
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+
       - name: Set up Rust
         uses: actions-rs/toolchain@v1
         with:
@@ -38,12 +49,12 @@ jobs:
         run: cargo build --release
 
       - name: Upload Build Artifacts
-        if: always()
+        if: never()
         uses: actions/upload-artifact@v3
         with:
           name: hrv-rs-build
           path: target/release/
-      
+
       - name: Install cargo-tarpaulin
         run: cargo install cargo-tarpaulin
 
@@ -52,15 +63,16 @@ jobs:
         env:
           RUSTFLAGS: "-C link-dead-code"  # Required for accurate coverage analysis
 
-      - name: Upload Coverage Report
-        uses: actions/upload-artifact@v3
+      - name: Upload coverage reports to Codecov
+        if: never()
+        uses: codecov/codecov-action@v5
         with:
-          name: coverage-report
-          path: tarpaulin-report.xml
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Upload to Codecov
+        if: never()
         uses: codecov/codecov-action@v3
         with:
           files: tarpaulin-report.xml
           fail_ci_if_error: true
-          flags: unittests
+          flags: unittests