restructure CI into preflight

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ env:
   RUSTFLAGS: "-Dwarnings"
 
 jobs:
-  # ── Stage 1: Compile-time checks ────────────────────────────────────
+  # ── Stage 1: Preflight ───────────────────────────────────────────────
   fmt:
     name: Formatting
     runs-on: ubuntu-latest
@@ -33,18 +33,6 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - run: cargo clippy --workspace --all-targets
 
-  compile:
-    name: Compile workspace
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
-      - name: Build all crates
-        run: cargo build --workspace
-      - name: Build in release mode
-        run: cargo build --workspace --release
-
   compile-wasm:
     name: Compile WASM target
     runs-on: ubuntu-latest
@@ -57,7 +45,21 @@ jobs:
       - name: Check crypto crate compiles for WASM
         run: cargo check -p salvium-crypto --target wasm32-unknown-unknown
 
-  # ── Stage 2: Unit tests (per-crate, parallel) ───────────────────────
+  # ── Stage 2: Compile workspace ───────────────────────────────────────
+  compile:
+    name: Compile workspace
+    needs: [fmt, clippy, compile-wasm]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: Build all crates
+        run: cargo build --workspace
+      - name: Build in release mode
+        run: cargo build --workspace --release
+
+  # ── Stage 3: Tests + docs ───────────────────────────────────────────
   test-types:
     name: "Test: types + consensus rules"
     needs: [compile]
@@ -114,7 +116,6 @@ jobs:
       - name: salvium-rpc
         run: cargo test -p salvium-rpc -- --nocapture
 
-  # ── Stage 3: Doc tests + documentation build ────────────────────────
   docs:
     name: Documentation
     needs: [compile]
@@ -137,8 +138,8 @@ jobs:
     needs:
       - fmt
       - clippy
-      - compile
       - compile-wasm
+      - compile
       - test-types
       - test-crypto
       - test-wallet